drivers/scsi/qedi/qedi_main.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * QLogic iSCSI Offload Driver
   4  * Copyright (c) 2016 Cavium Inc.
   5  */
   6
   7 #include <linux/module.h>
   8 #include <linux/pci.h>
   9 #include <linux/kernel.h>
  10 #include <linux/if_arp.h>
  11 #include <scsi/iscsi_if.h>
  12 #include <linux/inet.h>
  13 #include <net/arp.h>
  14 #include <linux/list.h>
  15 #include <linux/kthread.h>
  16 #include <linux/mm.h>
  17 #include <linux/if_vlan.h>
  18 #include <linux/cpu.h>
  19 #include <linux/iscsi_boot_sysfs.h>
  20
  21 #include <scsi/scsi_cmnd.h>
  22 #include <scsi/scsi_device.h>
  23 #include <scsi/scsi_eh.h>
  24 #include <scsi/scsi_host.h>
  25 #include <scsi/scsi.h>
  26
  27 #include "qedi.h"
  28 #include "qedi_gbl.h"
  29 #include "qedi_iscsi.h"
  30
  31 static uint qedi_qed_debug;
  32 module_param(qedi_qed_debug, uint, 0644);
  33 MODULE_PARM_DESC(qedi_qed_debug, " QED debug level 0 (default)");
  34
  35 static uint qedi_fw_debug;
  36 module_param(qedi_fw_debug, uint, 0644);
  37 MODULE_PARM_DESC(qedi_fw_debug, " Firmware debug level 0(default) to 3");
  38
  39 uint qedi_dbg_log = QEDI_LOG_WARN | QEDI_LOG_SCSI_TM;
  40 module_param(qedi_dbg_log, uint, 0644);
  41 MODULE_PARM_DESC(qedi_dbg_log, " Default debug level");
  42
  43 uint qedi_io_tracing;
  44 module_param(qedi_io_tracing, uint, 0644);
  45 MODULE_PARM_DESC(qedi_io_tracing,
  46                  " Enable logging of SCSI requests/completions into trace buffer. (default off).");
  47
  48 static uint qedi_ll2_buf_size = 0x400;
  49 module_param(qedi_ll2_buf_size, uint, 0644);
  50 MODULE_PARM_DESC(qedi_ll2_buf_size,
  51                  "parameter to set ping packet size, default - 0x400, Jumbo packets - 0x2400.");
  52
  53 const struct qed_iscsi_ops *qedi_ops;
  54 static struct scsi_transport_template *qedi_scsi_transport;
  55 static struct pci_driver qedi_pci_driver;
  56 static DEFINE_PER_CPU(struct qedi_percpu_s, qedi_percpu);
  57 static LIST_HEAD(qedi_udev_list);
  58 /* Static function declaration */
  59 static int qedi_alloc_global_queues(struct qedi_ctx *qedi);
  60 static void qedi_free_global_queues(struct qedi_ctx *qedi);
  61 static struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid);
  62 static void qedi_reset_uio_rings(struct qedi_uio_dev *udev);
  63 static void qedi_ll2_free_skbs(struct qedi_ctx *qedi);
  64 static struct nvm_iscsi_block *qedi_get_nvram_block(struct qedi_ctx *qedi);
  65 static void qedi_recovery_handler(struct work_struct *work);
  66
  67 static int qedi_iscsi_event_cb(void *context, u8 fw_event_code, void *fw_handle)
  68 {
  69         struct qedi_ctx *qedi;
  70         struct qedi_endpoint *qedi_ep;
  71         struct iscsi_eqe_data *data;
  72         int rval = 0;
  73
  74         if (!context || !fw_handle) {
  75                 QEDI_ERR(NULL, "Recv event with ctx NULL\n");
  76                 return -EINVAL;
  77         }
  78
  79         qedi = (struct qedi_ctx *)context;
  80         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
  81                   "Recv Event %d fw_handle %p\n", fw_event_code, fw_handle);
  82
  83         data = (struct iscsi_eqe_data *)fw_handle;
  84         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
  85                   "icid=0x%x conn_id=0x%x err-code=0x%x error-pdu-opcode-reserved=0x%x\n",
  86                    data->icid, data->conn_id, data->error_code,
  87                    data->error_pdu_opcode_reserved);
  88
  89         qedi_ep = qedi->ep_tbl[data->icid];
  90
  91         if (!qedi_ep) {
  92                 QEDI_WARN(&qedi->dbg_ctx,
  93                           "Cannot process event, ep already disconnected, cid=0x%x\n",
  94                            data->icid);
  95                 WARN_ON(1);
  96                 return -ENODEV;
  97         }
  98
  99         switch (fw_event_code) {
 100         case ISCSI_EVENT_TYPE_ASYN_CONNECT_COMPLETE:
 101                 if (qedi_ep->state == EP_STATE_OFLDCONN_START)
 102                         qedi_ep->state = EP_STATE_OFLDCONN_COMPL;
 103
 104                 wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
 105                 break;
 106         case ISCSI_EVENT_TYPE_ASYN_TERMINATE_DONE:
 107                 qedi_ep->state = EP_STATE_DISCONN_COMPL;
 108                 wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
 109                 break;
 110         case ISCSI_EVENT_TYPE_ISCSI_CONN_ERROR:
 111                 qedi_process_iscsi_error(qedi_ep, data);
 112                 break;
 113         case ISCSI_EVENT_TYPE_ASYN_ABORT_RCVD:
 114         case ISCSI_EVENT_TYPE_ASYN_SYN_RCVD:
 115         case ISCSI_EVENT_TYPE_ASYN_MAX_RT_TIME:
 116         case ISCSI_EVENT_TYPE_ASYN_MAX_RT_CNT:
 117         case ISCSI_EVENT_TYPE_ASYN_MAX_KA_PROBES_CNT:
 118         case ISCSI_EVENT_TYPE_ASYN_FIN_WAIT2:
 119         case ISCSI_EVENT_TYPE_TCP_CONN_ERROR:
 120                 qedi_process_tcp_error(qedi_ep, data);
 121                 break;
 122         default:
 123                 QEDI_ERR(&qedi->dbg_ctx, "Recv Unknown Event %u\n",
 124                          fw_event_code);
 125         }
 126
 127         return rval;
 128 }
 129
 130 static int qedi_uio_open(struct uio_info *uinfo, struct inode *inode)
 131 {
 132         struct qedi_uio_dev *udev = uinfo->priv;
 133         struct qedi_ctx *qedi = udev->qedi;
 134
 135         if (!capable(CAP_NET_ADMIN))
 136                 return -EPERM;
 137
 138         if (udev->uio_dev != -1)
 139                 return -EBUSY;
 140
 141         rtnl_lock();
 142         udev->uio_dev = iminor(inode);
 143         qedi_reset_uio_rings(udev);
 144         set_bit(UIO_DEV_OPENED, &qedi->flags);
 145         rtnl_unlock();
 146
 147         return 0;
 148 }
 149
 150 static int qedi_uio_close(struct uio_info *uinfo, struct inode *inode)
 151 {
 152         struct qedi_uio_dev *udev = uinfo->priv;
 153         struct qedi_ctx *qedi = udev->qedi;
 154
 155         udev->uio_dev = -1;
 156         clear_bit(UIO_DEV_OPENED, &qedi->flags);
 157         qedi_ll2_free_skbs(qedi);
 158         return 0;
 159 }
 160
 161 static void __qedi_free_uio_rings(struct qedi_uio_dev *udev)
 162 {
 163         if (udev->uctrl) {
 164                 free_page((unsigned long)udev->uctrl);
 165                 udev->uctrl = NULL;
 166         }
 167
 168         if (udev->ll2_ring) {
 169                 free_page((unsigned long)udev->ll2_ring);
 170                 udev->ll2_ring = NULL;
 171         }
 172
 173         if (udev->ll2_buf) {
 174                 free_pages((unsigned long)udev->ll2_buf, 2);
 175                 udev->ll2_buf = NULL;
 176         }
 177 }
 178
 179 static void __qedi_free_uio(struct qedi_uio_dev *udev)
 180 {
 181         uio_unregister_device(&udev->qedi_uinfo);
 182
 183         __qedi_free_uio_rings(udev);
 184
 185         pci_dev_put(udev->pdev);
 186         kfree(udev);
 187 }
 188
 189 static void qedi_free_uio(struct qedi_uio_dev *udev)
 190 {
 191         if (!udev)
 192                 return;
 193
 194         list_del_init(&udev->list);
 195         __qedi_free_uio(udev);
 196 }
 197
 198 static void qedi_reset_uio_rings(struct qedi_uio_dev *udev)
 199 {
 200         struct qedi_ctx *qedi = NULL;
 201         struct qedi_uio_ctrl *uctrl = NULL;
 202
 203         qedi = udev->qedi;
 204         uctrl = udev->uctrl;
 205
 206         spin_lock_bh(&qedi->ll2_lock);
 207         uctrl->host_rx_cons = 0;
 208         uctrl->hw_rx_prod = 0;
 209         uctrl->hw_rx_bd_prod = 0;
 210         uctrl->host_rx_bd_cons = 0;
 211
 212         memset(udev->ll2_ring, 0, udev->ll2_ring_size);
 213         memset(udev->ll2_buf, 0, udev->ll2_buf_size);
 214         spin_unlock_bh(&qedi->ll2_lock);
 215 }
 216
 217 static int __qedi_alloc_uio_rings(struct qedi_uio_dev *udev)
 218 {
 219         int rc = 0;
 220
 221         if (udev->ll2_ring || udev->ll2_buf)
 222                 return rc;
 223
 224         /* Memory for control area.  */
 225         udev->uctrl = (void *)get_zeroed_page(GFP_KERNEL);
 226         if (!udev->uctrl)
 227                 return -ENOMEM;
 228
 229         /* Allocating memory for LL2 ring  */
 230         udev->ll2_ring_size = QEDI_PAGE_SIZE;
 231         udev->ll2_ring = (void *)get_zeroed_page(GFP_KERNEL | __GFP_COMP);
 232         if (!udev->ll2_ring) {
 233                 rc = -ENOMEM;
 234                 goto exit_alloc_ring;
 235         }
 236
 237         /* Allocating memory for Tx/Rx pkt buffer */
 238         udev->ll2_buf_size = TX_RX_RING * qedi_ll2_buf_size;
 239         udev->ll2_buf_size = QEDI_PAGE_ALIGN(udev->ll2_buf_size);
 240         udev->ll2_buf = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP |
 241                                                  __GFP_ZERO, 2);
 242         if (!udev->ll2_buf) {
 243                 rc = -ENOMEM;
 244                 goto exit_alloc_buf;
 245         }
 246         return rc;
 247
 248 exit_alloc_buf:
 249         free_page((unsigned long)udev->ll2_ring);
 250         udev->ll2_ring = NULL;
 251 exit_alloc_ring:
 252         return rc;
 253 }
 254
 255 static int qedi_alloc_uio_rings(struct qedi_ctx *qedi)
 256 {
 257         struct qedi_uio_dev *udev = NULL;
 258         int rc = 0;
 259
 260         list_for_each_entry(udev, &qedi_udev_list, list) {
 261                 if (udev->pdev == qedi->pdev) {
 262                         udev->qedi = qedi;
 263                         if (__qedi_alloc_uio_rings(udev)) {
 264                                 udev->qedi = NULL;
 265                                 return -ENOMEM;
 266                         }
 267                         qedi->udev = udev;
 268                         return 0;
 269                 }
 270         }
 271
 272         udev = kzalloc(sizeof(*udev), GFP_KERNEL);
 273         if (!udev) {
 274                 rc = -ENOMEM;
 275                 goto err_udev;
 276         }
 277
 278         udev->uio_dev = -1;
 279
 280         udev->qedi = qedi;
 281         udev->pdev = qedi->pdev;
 282
 283         rc = __qedi_alloc_uio_rings(udev);
 284         if (rc)
 285                 goto err_uctrl;
 286
 287         list_add(&udev->list, &qedi_udev_list);
 288
 289         pci_dev_get(udev->pdev);
 290         qedi->udev = udev;
 291
 292         udev->tx_pkt = udev->ll2_buf;
 293         udev->rx_pkt = udev->ll2_buf + qedi_ll2_buf_size;
 294         return 0;
 295
 296  err_uctrl:
 297         kfree(udev);
 298  err_udev:
 299         return -ENOMEM;
 300 }
 301
 302 static int qedi_init_uio(struct qedi_ctx *qedi)
 303 {
 304         struct qedi_uio_dev *udev = qedi->udev;
 305         struct uio_info *uinfo;
 306         int ret = 0;
 307
 308         if (!udev)
 309                 return -ENOMEM;
 310
 311         uinfo = &udev->qedi_uinfo;
 312
 313         uinfo->mem[0].addr = (unsigned long)udev->uctrl;
 314         uinfo->mem[0].size = sizeof(struct qedi_uio_ctrl);
 315         uinfo->mem[0].memtype = UIO_MEM_LOGICAL;
 316
 317         uinfo->mem[1].addr = (unsigned long)udev->ll2_ring;
 318         uinfo->mem[1].size = udev->ll2_ring_size;
 319         uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
 320
 321         uinfo->mem[2].addr = (unsigned long)udev->ll2_buf;
 322         uinfo->mem[2].size = udev->ll2_buf_size;
 323         uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
 324
 325         uinfo->name = "qedi_uio";
 326         uinfo->version = QEDI_MODULE_VERSION;
 327         uinfo->irq = UIO_IRQ_CUSTOM;
 328
 329         uinfo->open = qedi_uio_open;
 330         uinfo->release = qedi_uio_close;
 331
 332         if (udev->uio_dev == -1) {
 333                 if (!uinfo->priv) {
 334                         uinfo->priv = udev;
 335
 336                         ret = uio_register_device(&udev->pdev->dev, uinfo);
 337                         if (ret) {
 338                                 QEDI_ERR(&qedi->dbg_ctx,
 339                                          "UIO registration failed\n");
 340                         }
 341                 }
 342         }
 343
 344         return ret;
 345 }
 346
 347 static int qedi_alloc_and_init_sb(struct qedi_ctx *qedi,
 348                                   struct qed_sb_info *sb_info, u16 sb_id)
 349 {
 350         struct status_block_e4 *sb_virt;
 351         dma_addr_t sb_phys;
 352         int ret;
 353
 354         sb_virt = dma_alloc_coherent(&qedi->pdev->dev,
 355                                      sizeof(struct status_block_e4), &sb_phys,
 356                                      GFP_KERNEL);
 357         if (!sb_virt) {
 358                 QEDI_ERR(&qedi->dbg_ctx,
 359                          "Status block allocation failed for id = %d.\n",
 360                           sb_id);
 361                 return -ENOMEM;
 362         }
 363
 364         ret = qedi_ops->common->sb_init(qedi->cdev, sb_info, sb_virt, sb_phys,
 365                                        sb_id, QED_SB_TYPE_STORAGE);
 366         if (ret) {
 367                 QEDI_ERR(&qedi->dbg_ctx,
 368                          "Status block initialization failed for id = %d.\n",
 369                           sb_id);
 370                 return ret;
 371         }
 372
 373         return 0;
 374 }
 375
 376 static void qedi_free_sb(struct qedi_ctx *qedi)
 377 {
 378         struct qed_sb_info *sb_info;
 379         int id;
 380
 381         for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
 382                 sb_info = &qedi->sb_array[id];
 383                 if (sb_info->sb_virt)
 384                         dma_free_coherent(&qedi->pdev->dev,
 385                                           sizeof(*sb_info->sb_virt),
 386                                           (void *)sb_info->sb_virt,
 387                                           sb_info->sb_phys);
 388         }
 389 }
 390
 391 static void qedi_free_fp(struct qedi_ctx *qedi)
 392 {
 393         kfree(qedi->fp_array);
 394         kfree(qedi->sb_array);
 395 }
 396
 397 static void qedi_destroy_fp(struct qedi_ctx *qedi)
 398 {
 399         qedi_free_sb(qedi);
 400         qedi_free_fp(qedi);
 401 }
 402
 403 static int qedi_alloc_fp(struct qedi_ctx *qedi)
 404 {
 405         int ret = 0;
 406
 407         qedi->fp_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
 408                                  sizeof(struct qedi_fastpath), GFP_KERNEL);
 409         if (!qedi->fp_array) {
 410                 QEDI_ERR(&qedi->dbg_ctx,
 411                          "fastpath fp array allocation failed.\n");
 412                 return -ENOMEM;
 413         }
 414
 415         qedi->sb_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
 416                                  sizeof(struct qed_sb_info), GFP_KERNEL);
 417         if (!qedi->sb_array) {
 418                 QEDI_ERR(&qedi->dbg_ctx,
 419                          "fastpath sb array allocation failed.\n");
 420                 ret = -ENOMEM;
 421                 goto free_fp;
 422         }
 423
 424         return ret;
 425
 426 free_fp:
 427         qedi_free_fp(qedi);
 428         return ret;
 429 }
 430
 431 static void qedi_int_fp(struct qedi_ctx *qedi)
 432 {
 433         struct qedi_fastpath *fp;
 434         int id;
 435
 436         memset(qedi->fp_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
 437                sizeof(*qedi->fp_array));
 438         memset(qedi->sb_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
 439                sizeof(*qedi->sb_array));
 440
 441         for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
 442                 fp = &qedi->fp_array[id];
 443                 fp->sb_info = &qedi->sb_array[id];
 444                 fp->sb_id = id;
 445                 fp->qedi = qedi;
 446                 snprintf(fp->name, sizeof(fp->name), "%s-fp-%d",
 447                          "qedi", id);
 448
 449                 /* fp_array[i] ---- irq cookie
 450                  * So init data which is needed in int ctx
 451                  */
 452         }
 453 }
 454
 455 static int qedi_prepare_fp(struct qedi_ctx *qedi)
 456 {
 457         struct qedi_fastpath *fp;
 458         int id, ret = 0;
 459
 460         ret = qedi_alloc_fp(qedi);
 461         if (ret)
 462                 goto err;
 463
 464         qedi_int_fp(qedi);
 465
 466         for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
 467                 fp = &qedi->fp_array[id];
 468                 ret = qedi_alloc_and_init_sb(qedi, fp->sb_info, fp->sb_id);
 469                 if (ret) {
 470                         QEDI_ERR(&qedi->dbg_ctx,
 471                                  "SB allocation and initialization failed.\n");
 472                         ret = -EIO;
 473                         goto err_init;
 474                 }
 475         }
 476
 477         return 0;
 478
 479 err_init:
 480         qedi_free_sb(qedi);
 481         qedi_free_fp(qedi);
 482 err:
 483         return ret;
 484 }
 485
 486 static int qedi_setup_cid_que(struct qedi_ctx *qedi)
 487 {
 488         int i;
 489
 490         qedi->cid_que.cid_que_base = kmalloc_array(qedi->max_active_conns,
 491                                                    sizeof(u32), GFP_KERNEL);
 492         if (!qedi->cid_que.cid_que_base)
 493                 return -ENOMEM;
 494
 495         qedi->cid_que.conn_cid_tbl = kmalloc_array(qedi->max_active_conns,
 496                                                    sizeof(struct qedi_conn *),
 497                                                    GFP_KERNEL);
 498         if (!qedi->cid_que.conn_cid_tbl) {
 499                 kfree(qedi->cid_que.cid_que_base);
 500                 qedi->cid_que.cid_que_base = NULL;
 501                 return -ENOMEM;
 502         }
 503
 504         qedi->cid_que.cid_que = (u32 *)qedi->cid_que.cid_que_base;
 505         qedi->cid_que.cid_q_prod_idx = 0;
 506         qedi->cid_que.cid_q_cons_idx = 0;
 507         qedi->cid_que.cid_q_max_idx = qedi->max_active_conns;
 508         qedi->cid_que.cid_free_cnt = qedi->max_active_conns;
 509
 510         for (i = 0; i < qedi->max_active_conns; i++) {
 511                 qedi->cid_que.cid_que[i] = i;
 512                 qedi->cid_que.conn_cid_tbl[i] = NULL;
 513         }
 514
 515         return 0;
 516 }
 517
 518 static void qedi_release_cid_que(struct qedi_ctx *qedi)
 519 {
 520         kfree(qedi->cid_que.cid_que_base);
 521         qedi->cid_que.cid_que_base = NULL;
 522
 523         kfree(qedi->cid_que.conn_cid_tbl);
 524         qedi->cid_que.conn_cid_tbl = NULL;
 525 }
 526
 527 static int qedi_init_id_tbl(struct qedi_portid_tbl *id_tbl, u16 size,
 528                             u16 start_id, u16 next)
 529 {
 530         id_tbl->start = start_id;
 531         id_tbl->max = size;
 532         id_tbl->next = next;
 533         spin_lock_init(&id_tbl->lock);
 534         id_tbl->table = kcalloc(BITS_TO_LONGS(size), sizeof(long), GFP_KERNEL);
 535         if (!id_tbl->table)
 536                 return -ENOMEM;
 537
 538         return 0;
 539 }
 540
 541 static void qedi_free_id_tbl(struct qedi_portid_tbl *id_tbl)
 542 {
 543         kfree(id_tbl->table);
 544         id_tbl->table = NULL;
 545 }
 546
 547 int qedi_alloc_id(struct qedi_portid_tbl *id_tbl, u16 id)
 548 {
 549         int ret = -1;
 550
 551         id -= id_tbl->start;
 552         if (id >= id_tbl->max)
 553                 return ret;
 554
 555         spin_lock(&id_tbl->lock);
 556         if (!test_bit(id, id_tbl->table)) {
 557                 set_bit(id, id_tbl->table);
 558                 ret = 0;
 559         }
 560         spin_unlock(&id_tbl->lock);
 561         return ret;
 562 }
 563
 564 u16 qedi_alloc_new_id(struct qedi_portid_tbl *id_tbl)
 565 {
 566         u16 id;
 567
 568         spin_lock(&id_tbl->lock);
 569         id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
 570         if (id >= id_tbl->max) {
 571                 id = QEDI_LOCAL_PORT_INVALID;
 572                 if (id_tbl->next != 0) {
 573                         id = find_first_zero_bit(id_tbl->table, id_tbl->next);
 574                         if (id >= id_tbl->next)
 575                                 id = QEDI_LOCAL_PORT_INVALID;
 576                 }
 577         }
 578
 579         if (id < id_tbl->max) {
 580                 set_bit(id, id_tbl->table);
 581                 id_tbl->next = (id + 1) & (id_tbl->max - 1);
 582                 id += id_tbl->start;
 583         }
 584
 585         spin_unlock(&id_tbl->lock);
 586
 587         return id;
 588 }
 589
 590 void qedi_free_id(struct qedi_portid_tbl *id_tbl, u16 id)
 591 {
 592         if (id == QEDI_LOCAL_PORT_INVALID)
 593                 return;
 594
 595         id -= id_tbl->start;
 596         if (id >= id_tbl->max)
 597                 return;
 598
 599         clear_bit(id, id_tbl->table);
 600 }
 601
 602 static void qedi_cm_free_mem(struct qedi_ctx *qedi)
 603 {
 604         kfree(qedi->ep_tbl);
 605         qedi->ep_tbl = NULL;
 606         qedi_free_id_tbl(&qedi->lcl_port_tbl);
 607 }
 608
 609 static int qedi_cm_alloc_mem(struct qedi_ctx *qedi)
 610 {
 611         u16 port_id;
 612
 613         qedi->ep_tbl = kzalloc((qedi->max_active_conns *
 614                                 sizeof(struct qedi_endpoint *)), GFP_KERNEL);
 615         if (!qedi->ep_tbl)
 616                 return -ENOMEM;
 617         port_id = prandom_u32() % QEDI_LOCAL_PORT_RANGE;
 618         if (qedi_init_id_tbl(&qedi->lcl_port_tbl, QEDI_LOCAL_PORT_RANGE,
 619                              QEDI_LOCAL_PORT_MIN, port_id)) {
 620                 qedi_cm_free_mem(qedi);
 621                 return -ENOMEM;
 622         }
 623
 624         return 0;
 625 }
 626
 627 static struct qedi_ctx *qedi_host_alloc(struct pci_dev *pdev)
 628 {
 629         struct Scsi_Host *shost;
 630         struct qedi_ctx *qedi = NULL;
 631
 632         shost = iscsi_host_alloc(&qedi_host_template,
 633                                  sizeof(struct qedi_ctx), 0);
 634         if (!shost) {
 635                 QEDI_ERR(NULL, "Could not allocate shost\n");
 636                 goto exit_setup_shost;
 637         }
 638
 639         shost->max_id = QEDI_MAX_ISCSI_CONNS_PER_HBA;
 640         shost->max_channel = 0;
 641         shost->max_lun = ~0;
 642         shost->max_cmd_len = 16;
 643         shost->transportt = qedi_scsi_transport;
 644
 645         qedi = iscsi_host_priv(shost);
 646         memset(qedi, 0, sizeof(*qedi));
 647         qedi->shost = shost;
 648         qedi->dbg_ctx.host_no = shost->host_no;
 649         qedi->pdev = pdev;
 650         qedi->dbg_ctx.pdev = pdev;
 651         qedi->max_active_conns = ISCSI_MAX_SESS_PER_HBA;
 652         qedi->max_sqes = QEDI_SQ_SIZE;
 653
 654         shost->nr_hw_queues = MIN_NUM_CPUS_MSIX(qedi);
 655
 656         pci_set_drvdata(pdev, qedi);
 657
 658 exit_setup_shost:
 659         return qedi;
 660 }
 661
 662 static int qedi_ll2_rx(void *cookie, struct sk_buff *skb, u32 arg1, u32 arg2)
 663 {
 664         struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
 665         struct skb_work_list *work;
 666         struct ethhdr *eh;
 667
 668         if (!qedi) {
 669                 QEDI_ERR(NULL, "qedi is NULL\n");
 670                 return -1;
 671         }
 672
 673         if (!test_bit(UIO_DEV_OPENED, &qedi->flags)) {
 674                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UIO,
 675                           "UIO DEV is not opened\n");
 676                 kfree_skb(skb);
 677                 return 0;
 678         }
 679
 680         eh = (struct ethhdr *)skb->data;
 681         /* Undo VLAN encapsulation */
 682         if (eh->h_proto == htons(ETH_P_8021Q)) {
 683                 memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
 684                 eh = (struct ethhdr *)skb_pull(skb, VLAN_HLEN);
 685                 skb_reset_mac_header(skb);
 686         }
 687
 688         /* Filter out non FIP/FCoE frames here to free them faster */
 689         if (eh->h_proto != htons(ETH_P_ARP) &&
 690             eh->h_proto != htons(ETH_P_IP) &&
 691             eh->h_proto != htons(ETH_P_IPV6)) {
 692                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
 693                           "Dropping frame ethertype [0x%x] len [0x%x].\n",
 694                           eh->h_proto, skb->len);
 695                 kfree_skb(skb);
 696                 return 0;
 697         }
 698
 699         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
 700                   "Allowed frame ethertype [0x%x] len [0x%x].\n",
 701                   eh->h_proto, skb->len);
 702
 703         work = kzalloc(sizeof(*work), GFP_ATOMIC);
 704         if (!work) {
 705                 QEDI_WARN(&qedi->dbg_ctx,
 706                           "Could not allocate work so dropping frame.\n");
 707                 kfree_skb(skb);
 708                 return 0;
 709         }
 710
 711         INIT_LIST_HEAD(&work->list);
 712         work->skb = skb;
 713
 714         if (skb_vlan_tag_present(skb))
 715                 work->vlan_id = skb_vlan_tag_get(skb);
 716
 717         if (work->vlan_id)
 718                 __vlan_insert_tag(work->skb, htons(ETH_P_8021Q), work->vlan_id);
 719
 720         spin_lock_bh(&qedi->ll2_lock);
 721         list_add_tail(&work->list, &qedi->ll2_skb_list);
 722         spin_unlock_bh(&qedi->ll2_lock);
 723
 724         wake_up_process(qedi->ll2_recv_thread);
 725
 726         return 0;
 727 }
 728
 729 /* map this skb to iscsiuio mmaped region */
 730 static int qedi_ll2_process_skb(struct qedi_ctx *qedi, struct sk_buff *skb,
 731                                 u16 vlan_id)
 732 {
 733         struct qedi_uio_dev *udev = NULL;
 734         struct qedi_uio_ctrl *uctrl = NULL;
 735         struct qedi_rx_bd rxbd;
 736         struct qedi_rx_bd *p_rxbd;
 737         u32 rx_bd_prod;
 738         void *pkt;
 739         int len = 0;
 740         u32 prod;
 741
 742         if (!qedi) {
 743                 QEDI_ERR(NULL, "qedi is NULL\n");
 744                 return -1;
 745         }
 746
 747         udev = qedi->udev;
 748         uctrl = udev->uctrl;
 749
 750         ++uctrl->hw_rx_prod_cnt;
 751         prod = (uctrl->hw_rx_prod + 1) % RX_RING;
 752
 753         pkt = udev->rx_pkt + (prod * qedi_ll2_buf_size);
 754         len = min_t(u32, skb->len, (u32)qedi_ll2_buf_size);
 755         memcpy(pkt, skb->data, len);
 756
 757         memset(&rxbd, 0, sizeof(rxbd));
 758         rxbd.rx_pkt_index = prod;
 759         rxbd.rx_pkt_len = len;
 760         rxbd.vlan_id = vlan_id;
 761
 762         uctrl->hw_rx_bd_prod = (uctrl->hw_rx_bd_prod + 1) % QEDI_NUM_RX_BD;
 763         rx_bd_prod = uctrl->hw_rx_bd_prod;
 764         p_rxbd = (struct qedi_rx_bd *)udev->ll2_ring;
 765         p_rxbd += rx_bd_prod;
 766
 767         memcpy(p_rxbd, &rxbd, sizeof(rxbd));
 768
 769         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
 770                   "hw_rx_prod [%d] prod [%d] hw_rx_bd_prod [%d] rx_pkt_idx [%d] rx_len [%d].\n",
 771                   uctrl->hw_rx_prod, prod, uctrl->hw_rx_bd_prod,
 772                   rxbd.rx_pkt_index, rxbd.rx_pkt_len);
 773         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
 774                   "host_rx_cons [%d] hw_rx_bd_cons [%d].\n",
 775                   uctrl->host_rx_cons, uctrl->host_rx_bd_cons);
 776
 777         uctrl->hw_rx_prod = prod;
 778
 779         /* notify the iscsiuio about new packet */
 780         uio_event_notify(&udev->qedi_uinfo);
 781
 782         return 0;
 783 }
 784
 785 static void qedi_ll2_free_skbs(struct qedi_ctx *qedi)
 786 {
 787         struct skb_work_list *work, *work_tmp;
 788
 789         spin_lock_bh(&qedi->ll2_lock);
 790         list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list, list) {
 791                 list_del(&work->list);
 792                 if (work->skb)
 793                         kfree_skb(work->skb);
 794                 kfree(work);
 795         }
 796         spin_unlock_bh(&qedi->ll2_lock);
 797 }
 798
 799 static int qedi_ll2_recv_thread(void *arg)
 800 {
 801         struct qedi_ctx *qedi = (struct qedi_ctx *)arg;
 802         struct skb_work_list *work, *work_tmp;
 803
 804         set_user_nice(current, -20);
 805
 806         while (!kthread_should_stop()) {
 807                 spin_lock_bh(&qedi->ll2_lock);
 808                 list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list,
 809                                          list) {
 810                         list_del(&work->list);
 811                         qedi_ll2_process_skb(qedi, work->skb, work->vlan_id);
 812                         kfree_skb(work->skb);
 813                         kfree(work);
 814                 }
 815                 set_current_state(TASK_INTERRUPTIBLE);
 816                 spin_unlock_bh(&qedi->ll2_lock);
 817                 schedule();
 818         }
 819
 820         __set_current_state(TASK_RUNNING);
 821         return 0;
 822 }
 823
 824 static int qedi_set_iscsi_pf_param(struct qedi_ctx *qedi)
 825 {
 826         u8 num_sq_pages;
 827         u32 log_page_size;
 828         int rval = 0;
 829
 830
 831         num_sq_pages = (MAX_OUTSTANDING_TASKS_PER_CON * 8) / QEDI_PAGE_SIZE;
 832
 833         qedi->num_queues = MIN_NUM_CPUS_MSIX(qedi);
 834
 835         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 836                   "Number of CQ count is %d\n", qedi->num_queues);
 837
 838         memset(&qedi->pf_params.iscsi_pf_params, 0,
 839                sizeof(qedi->pf_params.iscsi_pf_params));
 840
 841         qedi->p_cpuq = dma_alloc_coherent(&qedi->pdev->dev,
 842                         qedi->num_queues * sizeof(struct qedi_glbl_q_params),
 843                         &qedi->hw_p_cpuq, GFP_KERNEL);
 844         if (!qedi->p_cpuq) {
 845                 QEDI_ERR(&qedi->dbg_ctx, "dma_alloc_coherent fail\n");
 846                 rval = -1;
 847                 goto err_alloc_mem;
 848         }
 849
 850         rval = qedi_alloc_global_queues(qedi);
 851         if (rval) {
 852                 QEDI_ERR(&qedi->dbg_ctx, "Global queue allocation failed.\n");
 853                 rval = -1;
 854                 goto err_alloc_mem;
 855         }
 856
 857         qedi->pf_params.iscsi_pf_params.num_cons = QEDI_MAX_ISCSI_CONNS_PER_HBA;
 858         qedi->pf_params.iscsi_pf_params.num_tasks = QEDI_MAX_ISCSI_TASK;
 859         qedi->pf_params.iscsi_pf_params.half_way_close_timeout = 10;
 860         qedi->pf_params.iscsi_pf_params.num_sq_pages_in_ring = num_sq_pages;
 861         qedi->pf_params.iscsi_pf_params.num_r2tq_pages_in_ring = num_sq_pages;
 862         qedi->pf_params.iscsi_pf_params.num_uhq_pages_in_ring = num_sq_pages;
 863         qedi->pf_params.iscsi_pf_params.num_queues = qedi->num_queues;
 864         qedi->pf_params.iscsi_pf_params.debug_mode = qedi_fw_debug;
 865         qedi->pf_params.iscsi_pf_params.two_msl_timer = 4000;
 866         qedi->pf_params.iscsi_pf_params.max_fin_rt = 2;
 867
 868         for (log_page_size = 0 ; log_page_size < 32 ; log_page_size++) {
 869                 if ((1 << log_page_size) == QEDI_PAGE_SIZE)
 870                         break;
 871         }
 872         qedi->pf_params.iscsi_pf_params.log_page_size = log_page_size;
 873
 874         qedi->pf_params.iscsi_pf_params.glbl_q_params_addr =
 875                                                            (u64)qedi->hw_p_cpuq;
 876
 877         /* RQ BDQ initializations.
 878          * rq_num_entries: suggested value for Initiator is 16 (4KB RQ)
 879          * rqe_log_size: 8 for 256B RQE
 880          */
 881         qedi->pf_params.iscsi_pf_params.rqe_log_size = 8;
 882         /* BDQ address and size */
 883         qedi->pf_params.iscsi_pf_params.bdq_pbl_base_addr[BDQ_ID_RQ] =
 884                                                         qedi->bdq_pbl_list_dma;
 885         qedi->pf_params.iscsi_pf_params.bdq_pbl_num_entries[BDQ_ID_RQ] =
 886                                                 qedi->bdq_pbl_list_num_entries;
 887         qedi->pf_params.iscsi_pf_params.rq_buffer_size = QEDI_BDQ_BUF_SIZE;
 888
 889         /* cq_num_entries: num_tasks + rq_num_entries */
 890         qedi->pf_params.iscsi_pf_params.cq_num_entries = 2048;
 891
 892         qedi->pf_params.iscsi_pf_params.gl_rq_pi = QEDI_PROTO_CQ_PROD_IDX;
 893         qedi->pf_params.iscsi_pf_params.gl_cmd_pi = 1;
 894
 895 err_alloc_mem:
 896         return rval;
 897 }
 898
 899 /* Free DMA coherent memory for array of queue pointers we pass to qed */
 900 static void qedi_free_iscsi_pf_param(struct qedi_ctx *qedi)
 901 {
 902         size_t size = 0;
 903
 904         if (qedi->p_cpuq) {
 905                 size = qedi->num_queues * sizeof(struct qedi_glbl_q_params);
 906                 dma_free_coherent(&qedi->pdev->dev, size, qedi->p_cpuq,
 907                                     qedi->hw_p_cpuq);
 908         }
 909
 910         qedi_free_global_queues(qedi);
 911
 912         kfree(qedi->global_queues);
 913 }
 914
 915 static void qedi_get_boot_tgt_info(struct nvm_iscsi_block *block,
 916                                    struct qedi_boot_target *tgt, u8 index)
 917 {
 918         u32 ipv6_en;
 919
 920         ipv6_en = !!(block->generic.ctrl_flags &
 921                      NVM_ISCSI_CFG_GEN_IPV6_ENABLED);
 922
 923         snprintf(tgt->iscsi_name, sizeof(tgt->iscsi_name), "%s",
 924                  block->target[index].target_name.byte);
 925
 926         tgt->ipv6_en = ipv6_en;
 927
 928         if (ipv6_en)
 929                 snprintf(tgt->ip_addr, IPV6_LEN, "%pI6\n",
 930                          block->target[index].ipv6_addr.byte);
 931         else
 932                 snprintf(tgt->ip_addr, IPV4_LEN, "%pI4\n",
 933                          block->target[index].ipv4_addr.byte);
 934 }
 935
 936 static int qedi_find_boot_info(struct qedi_ctx *qedi,
 937                                struct qed_mfw_tlv_iscsi *iscsi,
 938                                struct nvm_iscsi_block *block)
 939 {
 940         struct qedi_boot_target *pri_tgt = NULL, *sec_tgt = NULL;
 941         u32 pri_ctrl_flags = 0, sec_ctrl_flags = 0, found = 0;
 942         struct iscsi_cls_session *cls_sess;
 943         struct iscsi_cls_conn *cls_conn;
 944         struct qedi_conn *qedi_conn;
 945         struct iscsi_session *sess;
 946         struct iscsi_conn *conn;
 947         char ep_ip_addr[64];
 948         int i, ret = 0;
 949
 950         pri_ctrl_flags = !!(block->target[0].ctrl_flags &
 951                                         NVM_ISCSI_CFG_TARGET_ENABLED);
 952         if (pri_ctrl_flags) {
 953                 pri_tgt = kzalloc(sizeof(*pri_tgt), GFP_KERNEL);
 954                 if (!pri_tgt)
 955                         return -1;
 956                 qedi_get_boot_tgt_info(block, pri_tgt, 0);
 957         }
 958
 959         sec_ctrl_flags = !!(block->target[1].ctrl_flags &
 960                                         NVM_ISCSI_CFG_TARGET_ENABLED);
 961         if (sec_ctrl_flags) {
 962                 sec_tgt = kzalloc(sizeof(*sec_tgt), GFP_KERNEL);
 963                 if (!sec_tgt) {
 964                         ret = -1;
 965                         goto free_tgt;
 966                 }
 967                 qedi_get_boot_tgt_info(block, sec_tgt, 1);
 968         }
 969
 970         for (i = 0; i < qedi->max_active_conns; i++) {
 971                 qedi_conn = qedi_get_conn_from_id(qedi, i);
 972                 if (!qedi_conn)
 973                         continue;
 974
 975                 if (qedi_conn->ep->ip_type == TCP_IPV4)
 976                         snprintf(ep_ip_addr, IPV4_LEN, "%pI4\n",
 977                                  qedi_conn->ep->dst_addr);
 978                 else
 979                         snprintf(ep_ip_addr, IPV6_LEN, "%pI6\n",
 980                                  qedi_conn->ep->dst_addr);
 981
 982                 cls_conn = qedi_conn->cls_conn;
 983                 conn = cls_conn->dd_data;
 984                 cls_sess = iscsi_conn_to_session(cls_conn);
 985                 sess = cls_sess->dd_data;
 986
 987                 if (!iscsi_is_session_online(cls_sess))
 988                         continue;
 989
 990                 if (!sess->targetname)
 991                         continue;
 992
 993                 if (pri_ctrl_flags) {
 994                         if (!strcmp(pri_tgt->iscsi_name, sess->targetname) &&
 995                             !strcmp(pri_tgt->ip_addr, ep_ip_addr)) {
 996                                 found = 1;
 997                                 break;
 998                         }
 999                 }
1000
1001                 if (sec_ctrl_flags) {
1002                         if (!strcmp(sec_tgt->iscsi_name, sess->targetname) &&
1003                             !strcmp(sec_tgt->ip_addr, ep_ip_addr)) {
1004                                 found = 1;
1005                                 break;
1006                         }
1007                 }
1008         }
1009
1010         if (found) {
1011                 if (conn->hdrdgst_en) {
1012                         iscsi->header_digest_set = true;
1013                         iscsi->header_digest = 1;
1014                 }
1015
1016                 if (conn->datadgst_en) {
1017                         iscsi->data_digest_set = true;
1018                         iscsi->data_digest = 1;
1019                 }
1020                 iscsi->boot_taget_portal_set = true;
1021                 iscsi->boot_taget_portal = sess->tpgt;
1022
1023         } else {
1024                 ret = -1;
1025         }
1026
1027         if (sec_ctrl_flags)
1028                 kfree(sec_tgt);
1029 free_tgt:
1030         if (pri_ctrl_flags)
1031                 kfree(pri_tgt);
1032
1033         return ret;
1034 }
1035
1036 static void qedi_get_generic_tlv_data(void *dev, struct qed_generic_tlvs *data)
1037 {
1038         struct qedi_ctx *qedi;
1039
1040         if (!dev) {
1041                 QEDI_INFO(NULL, QEDI_LOG_EVT,
1042                           "dev is NULL so ignoring get_generic_tlv_data request.\n");
1043                 return;
1044         }
1045         qedi = (struct qedi_ctx *)dev;
1046
1047         memset(data, 0, sizeof(struct qed_generic_tlvs));
1048         ether_addr_copy(data->mac[0], qedi->mac);
1049 }
1050
1051 /*
1052  * Protocol TLV handler
1053  */
1054 static void qedi_get_protocol_tlv_data(void *dev, void *data)
1055 {
1056         struct qed_mfw_tlv_iscsi *iscsi = data;
1057         struct qed_iscsi_stats *fw_iscsi_stats;
1058         struct nvm_iscsi_block *block = NULL;
1059         u32 chap_en = 0, mchap_en = 0;
1060         struct qedi_ctx *qedi = dev;
1061         int rval = 0;
1062
1063         fw_iscsi_stats = kmalloc(sizeof(*fw_iscsi_stats), GFP_KERNEL);
1064         if (!fw_iscsi_stats) {
1065                 QEDI_ERR(&qedi->dbg_ctx,
1066                          "Could not allocate memory for fw_iscsi_stats.\n");
1067                 goto exit_get_data;
1068         }
1069
1070         mutex_lock(&qedi->stats_lock);
1071         /* Query firmware for offload stats */
1072         qedi_ops->get_stats(qedi->cdev, fw_iscsi_stats);
1073         mutex_unlock(&qedi->stats_lock);
1074
1075         iscsi->rx_frames_set = true;
1076         iscsi->rx_frames = fw_iscsi_stats->iscsi_rx_packet_cnt;
1077         iscsi->rx_bytes_set = true;
1078         iscsi->rx_bytes = fw_iscsi_stats->iscsi_rx_bytes_cnt;
1079         iscsi->tx_frames_set = true;
1080         iscsi->tx_frames = fw_iscsi_stats->iscsi_tx_packet_cnt;
1081         iscsi->tx_bytes_set = true;
1082         iscsi->tx_bytes = fw_iscsi_stats->iscsi_tx_bytes_cnt;
1083         iscsi->frame_size_set = true;
1084         iscsi->frame_size = qedi->ll2_mtu;
1085         block = qedi_get_nvram_block(qedi);
1086         if (block) {
1087                 chap_en = !!(block->generic.ctrl_flags &
1088                              NVM_ISCSI_CFG_GEN_CHAP_ENABLED);
1089                 mchap_en = !!(block->generic.ctrl_flags &
1090                               NVM_ISCSI_CFG_GEN_CHAP_MUTUAL_ENABLED);
1091
1092                 iscsi->auth_method_set = (chap_en || mchap_en) ? true : false;
1093                 iscsi->auth_method = 1;
1094                 if (chap_en)
1095                         iscsi->auth_method = 2;
1096                 if (mchap_en)
1097                         iscsi->auth_method = 3;
1098
1099                 iscsi->tx_desc_size_set = true;
1100                 iscsi->tx_desc_size = QEDI_SQ_SIZE;
1101                 iscsi->rx_desc_size_set = true;
1102                 iscsi->rx_desc_size = QEDI_CQ_SIZE;
1103
1104                 /* tpgt, hdr digest, data digest */
1105                 rval = qedi_find_boot_info(qedi, iscsi, block);
1106                 if (rval)
1107                         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1108                                   "Boot target not set");
1109         }
1110
1111         kfree(fw_iscsi_stats);
1112 exit_get_data:
1113         return;
1114 }
1115
1116 static void qedi_schedule_recovery_handler(void *dev)
1117 {
1118         struct qedi_ctx *qedi = dev;
1119
1120         QEDI_ERR(&qedi->dbg_ctx, "Recovery handler scheduled.\n");
1121
1122         if (test_and_set_bit(QEDI_IN_RECOVERY, &qedi->flags))
1123                 return;
1124
1125         atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
1126
1127         schedule_delayed_work(&qedi->recovery_work, 0);
1128 }
1129
1130 static void qedi_link_update(void *dev, struct qed_link_output *link)
1131 {
1132         struct qedi_ctx *qedi = (struct qedi_ctx *)dev;
1133
1134         if (link->link_up) {
1135                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "Link Up event.\n");
1136                 atomic_set(&qedi->link_state, QEDI_LINK_UP);
1137         } else {
1138                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1139                           "Link Down event.\n");
1140                 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
1141         }
1142 }
1143
1144 static struct qed_iscsi_cb_ops qedi_cb_ops = {
1145         {
1146                 .link_update =          qedi_link_update,
1147                 .schedule_recovery_handler = qedi_schedule_recovery_handler,
1148                 .get_protocol_tlv_data = qedi_get_protocol_tlv_data,
1149                 .get_generic_tlv_data = qedi_get_generic_tlv_data,
1150         }
1151 };
1152
1153 static int qedi_queue_cqe(struct qedi_ctx *qedi, union iscsi_cqe *cqe,
1154                           u16 que_idx, struct qedi_percpu_s *p)
1155 {
1156         struct qedi_work *qedi_work;
1157         struct qedi_conn *q_conn;
1158         struct qedi_cmd *qedi_cmd;
1159         u32 iscsi_cid;
1160         int rc = 0;
1161
1162         iscsi_cid  = cqe->cqe_common.conn_id;
1163         q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
1164         if (!q_conn) {
1165                 QEDI_WARN(&qedi->dbg_ctx,
1166                           "Session no longer exists for cid=0x%x!!\n",
1167                           iscsi_cid);
1168                 return -1;
1169         }
1170
1171         switch (cqe->cqe_common.cqe_type) {
1172         case ISCSI_CQE_TYPE_SOLICITED:
1173         case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
1174                 qedi_cmd = qedi_get_cmd_from_tid(qedi, cqe->cqe_solicited.itid);
1175                 if (!qedi_cmd) {
1176                         rc = -1;
1177                         break;
1178                 }
1179                 INIT_LIST_HEAD(&qedi_cmd->cqe_work.list);
1180                 qedi_cmd->cqe_work.qedi = qedi;
1181                 memcpy(&qedi_cmd->cqe_work.cqe, cqe, sizeof(union iscsi_cqe));
1182                 qedi_cmd->cqe_work.que_idx = que_idx;
1183                 qedi_cmd->cqe_work.is_solicited = true;
1184                 list_add_tail(&qedi_cmd->cqe_work.list, &p->work_list);
1185                 break;
1186         case ISCSI_CQE_TYPE_UNSOLICITED:
1187         case ISCSI_CQE_TYPE_DUMMY:
1188         case ISCSI_CQE_TYPE_TASK_CLEANUP:
1189                 qedi_work = kzalloc(sizeof(*qedi_work), GFP_ATOMIC);
1190                 if (!qedi_work) {
1191                         rc = -1;
1192                         break;
1193                 }
1194                 INIT_LIST_HEAD(&qedi_work->list);
1195                 qedi_work->qedi = qedi;
1196                 memcpy(&qedi_work->cqe, cqe, sizeof(union iscsi_cqe));
1197                 qedi_work->que_idx = que_idx;
1198                 qedi_work->is_solicited = false;
1199                 list_add_tail(&qedi_work->list, &p->work_list);
1200                 break;
1201         default:
1202                 rc = -1;
1203                 QEDI_ERR(&qedi->dbg_ctx, "FW Error cqe.\n");
1204         }
1205         return rc;
1206 }
1207
1208 static bool qedi_process_completions(struct qedi_fastpath *fp)
1209 {
1210         struct qedi_ctx *qedi = fp->qedi;
1211         struct qed_sb_info *sb_info = fp->sb_info;
1212         struct status_block_e4 *sb = sb_info->sb_virt;
1213         struct qedi_percpu_s *p = NULL;
1214         struct global_queue *que;
1215         u16 prod_idx;
1216         unsigned long flags;
1217         union iscsi_cqe *cqe;
1218         int cpu;
1219         int ret;
1220
1221         /* Get the current firmware producer index */
1222         prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
1223
1224         if (prod_idx >= QEDI_CQ_SIZE)
1225                 prod_idx = prod_idx % QEDI_CQ_SIZE;
1226
1227         que = qedi->global_queues[fp->sb_id];
1228         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1229                   "Before: global queue=%p prod_idx=%d cons_idx=%d, sb_id=%d\n",
1230                   que, prod_idx, que->cq_cons_idx, fp->sb_id);
1231
1232         qedi->intr_cpu = fp->sb_id;
1233         cpu = smp_processor_id();
1234         p = &per_cpu(qedi_percpu, cpu);
1235
1236         if (unlikely(!p->iothread))
1237                 WARN_ON(1);
1238
1239         spin_lock_irqsave(&p->p_work_lock, flags);
1240         while (que->cq_cons_idx != prod_idx) {
1241                 cqe = &que->cq[que->cq_cons_idx];
1242
1243                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1244                           "cqe=%p prod_idx=%d cons_idx=%d.\n",
1245                           cqe, prod_idx, que->cq_cons_idx);
1246
1247                 ret = qedi_queue_cqe(qedi, cqe, fp->sb_id, p);
1248                 if (ret)
1249                         QEDI_WARN(&qedi->dbg_ctx,
1250                                   "Dropping CQE 0x%x for cid=0x%x.\n",
1251                                   que->cq_cons_idx, cqe->cqe_common.conn_id);
1252
1253                 que->cq_cons_idx++;
1254                 if (que->cq_cons_idx == QEDI_CQ_SIZE)
1255                         que->cq_cons_idx = 0;
1256         }
1257         wake_up_process(p->iothread);
1258         spin_unlock_irqrestore(&p->p_work_lock, flags);
1259
1260         return true;
1261 }
1262
1263 static bool qedi_fp_has_work(struct qedi_fastpath *fp)
1264 {
1265         struct qedi_ctx *qedi = fp->qedi;
1266         struct global_queue *que;
1267         struct qed_sb_info *sb_info = fp->sb_info;
1268         struct status_block_e4 *sb = sb_info->sb_virt;
1269         u16 prod_idx;
1270
1271         barrier();
1272
1273         /* Get the current firmware producer index */
1274         prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
1275
1276         /* Get the pointer to the global CQ this completion is on */
1277         que = qedi->global_queues[fp->sb_id];
1278
1279         /* prod idx wrap around uint16 */
1280         if (prod_idx >= QEDI_CQ_SIZE)
1281                 prod_idx = prod_idx % QEDI_CQ_SIZE;
1282
1283         return (que->cq_cons_idx != prod_idx);
1284 }
1285
1286 /* MSI-X fastpath handler code */
1287 static irqreturn_t qedi_msix_handler(int irq, void *dev_id)
1288 {
1289         struct qedi_fastpath *fp = dev_id;
1290         struct qedi_ctx *qedi = fp->qedi;
1291         bool wake_io_thread = true;
1292
1293         qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0);
1294
1295 process_again:
1296         wake_io_thread = qedi_process_completions(fp);
1297         if (wake_io_thread) {
1298                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1299                           "process already running\n");
1300         }
1301
1302         if (!qedi_fp_has_work(fp))
1303                 qed_sb_update_sb_idx(fp->sb_info);
1304
1305         /* Check for more work */
1306         rmb();
1307
1308         if (!qedi_fp_has_work(fp))
1309                 qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
1310         else
1311                 goto process_again;
1312
1313         return IRQ_HANDLED;
1314 }
1315
1316 /* simd handler for MSI/INTa */
1317 static void qedi_simd_int_handler(void *cookie)
1318 {
1319         /* Cookie is qedi_ctx struct */
1320         struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
1321
1322         QEDI_WARN(&qedi->dbg_ctx, "qedi=%p.\n", qedi);
1323 }
1324
1325 #define QEDI_SIMD_HANDLER_NUM           0
1326 static void qedi_sync_free_irqs(struct qedi_ctx *qedi)
1327 {
1328         int i;
1329         u16 idx;
1330
1331         if (qedi->int_info.msix_cnt) {
1332                 for (i = 0; i < qedi->int_info.used_cnt; i++) {
1333                         idx = i * qedi->dev_info.common.num_hwfns +
1334                         qedi_ops->common->get_affin_hwfn_idx(qedi->cdev);
1335
1336                         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1337                                   "Freeing IRQ #%d vector_idx=%d.\n", i, idx);
1338
1339                         synchronize_irq(qedi->int_info.msix[idx].vector);
1340                         irq_set_affinity_hint(qedi->int_info.msix[idx].vector,
1341                                               NULL);
1342                         free_irq(qedi->int_info.msix[idx].vector,
1343                                  &qedi->fp_array[i]);
1344                 }
1345         } else {
1346                 qedi_ops->common->simd_handler_clean(qedi->cdev,
1347                                                      QEDI_SIMD_HANDLER_NUM);
1348         }
1349
1350         qedi->int_info.used_cnt = 0;
1351         qedi_ops->common->set_fp_int(qedi->cdev, 0);
1352 }
1353
1354 static int qedi_request_msix_irq(struct qedi_ctx *qedi)
1355 {
1356         int i, rc, cpu;
1357         u16 idx;
1358
1359         cpu = cpumask_first(cpu_online_mask);
1360         for (i = 0; i < qedi->int_info.msix_cnt; i++) {
1361                 idx = i * qedi->dev_info.common.num_hwfns +
1362                           qedi_ops->common->get_affin_hwfn_idx(qedi->cdev);
1363
1364                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1365                           "dev_info: num_hwfns=%d affin_hwfn_idx=%d.\n",
1366                           qedi->dev_info.common.num_hwfns,
1367                           qedi_ops->common->get_affin_hwfn_idx(qedi->cdev));
1368
1369                 rc = request_irq(qedi->int_info.msix[idx].vector,
1370                                  qedi_msix_handler, 0, "qedi",
1371                                  &qedi->fp_array[i]);
1372                 if (rc) {
1373                         QEDI_WARN(&qedi->dbg_ctx, "request_irq failed.\n");
1374                         qedi_sync_free_irqs(qedi);
1375                         return rc;
1376                 }
1377                 qedi->int_info.used_cnt++;
1378                 rc = irq_set_affinity_hint(qedi->int_info.msix[idx].vector,
1379                                            get_cpu_mask(cpu));
1380                 cpu = cpumask_next(cpu, cpu_online_mask);
1381         }
1382
1383         return 0;
1384 }
1385
1386 static int qedi_setup_int(struct qedi_ctx *qedi)
1387 {
1388         int rc = 0;
1389
1390         rc = qedi_ops->common->set_fp_int(qedi->cdev, num_online_cpus());
1391         rc = qedi_ops->common->get_fp_int(qedi->cdev, &qedi->int_info);
1392         if (rc)
1393                 goto exit_setup_int;
1394
1395         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1396                   "Number of msix_cnt = 0x%x num of cpus = 0x%x\n",
1397                    qedi->int_info.msix_cnt, num_online_cpus());
1398
1399         if (qedi->int_info.msix_cnt) {
1400                 rc = qedi_request_msix_irq(qedi);
1401                 goto exit_setup_int;
1402         } else {
1403                 qedi_ops->common->simd_handler_config(qedi->cdev, &qedi,
1404                                                       QEDI_SIMD_HANDLER_NUM,
1405                                                       qedi_simd_int_handler);
1406                 qedi->int_info.used_cnt = 1;
1407         }
1408
1409 exit_setup_int:
1410         return rc;
1411 }
1412
1413 static void qedi_free_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1414 {
1415         if (qedi->iscsi_image)
1416                 dma_free_coherent(&qedi->pdev->dev,
1417                                   sizeof(struct qedi_nvm_iscsi_image),
1418                                   qedi->iscsi_image, qedi->nvm_buf_dma);
1419 }
1420
1421 static int qedi_alloc_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1422 {
1423         qedi->iscsi_image = dma_alloc_coherent(&qedi->pdev->dev,
1424                                                sizeof(struct qedi_nvm_iscsi_image),
1425                                                &qedi->nvm_buf_dma, GFP_KERNEL);
1426         if (!qedi->iscsi_image) {
1427                 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate NVM BUF.\n");
1428                 return -ENOMEM;
1429         }
1430         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1431                   "NVM BUF addr=0x%p dma=0x%llx.\n", qedi->iscsi_image,
1432                   qedi->nvm_buf_dma);
1433
1434         return 0;
1435 }
1436
1437 static void qedi_free_bdq(struct qedi_ctx *qedi)
1438 {
1439         int i;
1440
1441         if (qedi->bdq_pbl_list)
1442                 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
1443                                   qedi->bdq_pbl_list, qedi->bdq_pbl_list_dma);
1444
1445         if (qedi->bdq_pbl)
1446                 dma_free_coherent(&qedi->pdev->dev, qedi->bdq_pbl_mem_size,
1447                                   qedi->bdq_pbl, qedi->bdq_pbl_dma);
1448
1449         for (i = 0; i < QEDI_BDQ_NUM; i++) {
1450                 if (qedi->bdq[i].buf_addr) {
1451                         dma_free_coherent(&qedi->pdev->dev, QEDI_BDQ_BUF_SIZE,
1452                                           qedi->bdq[i].buf_addr,
1453                                           qedi->bdq[i].buf_dma);
1454                 }
1455         }
1456 }
1457
1458 static void qedi_free_global_queues(struct qedi_ctx *qedi)
1459 {
1460         int i;
1461         struct global_queue **gl = qedi->global_queues;
1462
1463         for (i = 0; i < qedi->num_queues; i++) {
1464                 if (!gl[i])
1465                         continue;
1466
1467                 if (gl[i]->cq)
1468                         dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_mem_size,
1469                                           gl[i]->cq, gl[i]->cq_dma);
1470                 if (gl[i]->cq_pbl)
1471                         dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_pbl_size,
1472                                           gl[i]->cq_pbl, gl[i]->cq_pbl_dma);
1473
1474                 kfree(gl[i]);
1475         }
1476         qedi_free_bdq(qedi);
1477         qedi_free_nvm_iscsi_cfg(qedi);
1478 }
1479
1480 static int qedi_alloc_bdq(struct qedi_ctx *qedi)
1481 {
1482         int i;
1483         struct scsi_bd *pbl;
1484         u64 *list;
1485         dma_addr_t page;
1486
1487         /* Alloc dma memory for BDQ buffers */
1488         for (i = 0; i < QEDI_BDQ_NUM; i++) {
1489                 qedi->bdq[i].buf_addr =
1490                                 dma_alloc_coherent(&qedi->pdev->dev,
1491                                                    QEDI_BDQ_BUF_SIZE,
1492                                                    &qedi->bdq[i].buf_dma,
1493                                                    GFP_KERNEL);
1494                 if (!qedi->bdq[i].buf_addr) {
1495                         QEDI_ERR(&qedi->dbg_ctx,
1496                                  "Could not allocate BDQ buffer %d.\n", i);
1497                         return -ENOMEM;
1498                 }
1499         }
1500
1501         /* Alloc dma memory for BDQ page buffer list */
1502         qedi->bdq_pbl_mem_size = QEDI_BDQ_NUM * sizeof(struct scsi_bd);
1503         qedi->bdq_pbl_mem_size = ALIGN(qedi->bdq_pbl_mem_size, QEDI_PAGE_SIZE);
1504         qedi->rq_num_entries = qedi->bdq_pbl_mem_size / sizeof(struct scsi_bd);
1505
1506         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, "rq_num_entries = %d.\n",
1507                   qedi->rq_num_entries);
1508
1509         qedi->bdq_pbl = dma_alloc_coherent(&qedi->pdev->dev,
1510                                            qedi->bdq_pbl_mem_size,
1511                                            &qedi->bdq_pbl_dma, GFP_KERNEL);
1512         if (!qedi->bdq_pbl) {
1513                 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate BDQ PBL.\n");
1514                 return -ENOMEM;
1515         }
1516
1517         /*
1518          * Populate BDQ PBL with physical and virtual address of individual
1519          * BDQ buffers
1520          */
1521         pbl = (struct scsi_bd  *)qedi->bdq_pbl;
1522         for (i = 0; i < QEDI_BDQ_NUM; i++) {
1523                 pbl->address.hi =
1524                                 cpu_to_le32(QEDI_U64_HI(qedi->bdq[i].buf_dma));
1525                 pbl->address.lo =
1526                                 cpu_to_le32(QEDI_U64_LO(qedi->bdq[i].buf_dma));
1527                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1528                           "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx], idx [%d]\n",
1529                           pbl, pbl->address.hi, pbl->address.lo, i);
1530                 pbl->opaque.iscsi_opaque.reserved_zero[0] = 0;
1531                 pbl->opaque.iscsi_opaque.reserved_zero[1] = 0;
1532                 pbl->opaque.iscsi_opaque.reserved_zero[2] = 0;
1533                 pbl->opaque.iscsi_opaque.opaque = cpu_to_le16(i);
1534                 pbl++;
1535         }
1536
1537         /* Allocate list of PBL pages */
1538         qedi->bdq_pbl_list = dma_alloc_coherent(&qedi->pdev->dev,
1539                                                 QEDI_PAGE_SIZE,
1540                                                 &qedi->bdq_pbl_list_dma,
1541                                                 GFP_KERNEL);
1542         if (!qedi->bdq_pbl_list) {
1543                 QEDI_ERR(&qedi->dbg_ctx,
1544                          "Could not allocate list of PBL pages.\n");
1545                 return -ENOMEM;
1546         }
1547
1548         /*
1549          * Now populate PBL list with pages that contain pointers to the
1550          * individual buffers.
1551          */
1552         qedi->bdq_pbl_list_num_entries = qedi->bdq_pbl_mem_size /
1553                                          QEDI_PAGE_SIZE;
1554         list = (u64 *)qedi->bdq_pbl_list;
1555         page = qedi->bdq_pbl_list_dma;
1556         for (i = 0; i < qedi->bdq_pbl_list_num_entries; i++) {
1557                 *list = qedi->bdq_pbl_dma;
1558                 list++;
1559                 page += QEDI_PAGE_SIZE;
1560         }
1561
1562         return 0;
1563 }
1564
1565 static int qedi_alloc_global_queues(struct qedi_ctx *qedi)
1566 {
1567         u32 *list;
1568         int i;
1569         int status = 0, rc;
1570         u32 *pbl;
1571         dma_addr_t page;
1572         int num_pages;
1573
1574         /*
1575          * Number of global queues (CQ / RQ). This should
1576          * be <= number of available MSIX vectors for the PF
1577          */
1578         if (!qedi->num_queues) {
1579                 QEDI_ERR(&qedi->dbg_ctx, "No MSI-X vectors available!\n");
1580                 return 1;
1581         }
1582
1583         /* Make sure we allocated the PBL that will contain the physical
1584          * addresses of our queues
1585          */
1586         if (!qedi->p_cpuq) {
1587                 status = 1;
1588                 goto mem_alloc_failure;
1589         }
1590
1591         qedi->global_queues = kzalloc((sizeof(struct global_queue *) *
1592                                        qedi->num_queues), GFP_KERNEL);
1593         if (!qedi->global_queues) {
1594                 QEDI_ERR(&qedi->dbg_ctx,
1595                          "Unable to allocate global queues array ptr memory\n");
1596                 return -ENOMEM;
1597         }
1598         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1599                   "qedi->global_queues=%p.\n", qedi->global_queues);
1600
1601         /* Allocate DMA coherent buffers for BDQ */
1602         rc = qedi_alloc_bdq(qedi);
1603         if (rc)
1604                 goto mem_alloc_failure;
1605
1606         /* Allocate DMA coherent buffers for NVM_ISCSI_CFG */
1607         rc = qedi_alloc_nvm_iscsi_cfg(qedi);
1608         if (rc)
1609                 goto mem_alloc_failure;
1610
1611         /* Allocate a CQ and an associated PBL for each MSI-X
1612          * vector.
1613          */
1614         for (i = 0; i < qedi->num_queues; i++) {
1615                 qedi->global_queues[i] =
1616                                         kzalloc(sizeof(*qedi->global_queues[0]),
1617                                                 GFP_KERNEL);
1618                 if (!qedi->global_queues[i]) {
1619                         QEDI_ERR(&qedi->dbg_ctx,
1620                                  "Unable to allocation global queue %d.\n", i);
1621                         goto mem_alloc_failure;
1622                 }
1623
1624                 qedi->global_queues[i]->cq_mem_size =
1625                     (QEDI_CQ_SIZE + 8) * sizeof(union iscsi_cqe);
1626                 qedi->global_queues[i]->cq_mem_size =
1627                     (qedi->global_queues[i]->cq_mem_size +
1628                     (QEDI_PAGE_SIZE - 1));
1629
1630                 qedi->global_queues[i]->cq_pbl_size =
1631                     (qedi->global_queues[i]->cq_mem_size /
1632                     QEDI_PAGE_SIZE) * sizeof(void *);
1633                 qedi->global_queues[i]->cq_pbl_size =
1634                     (qedi->global_queues[i]->cq_pbl_size +
1635                     (QEDI_PAGE_SIZE - 1));
1636
1637                 qedi->global_queues[i]->cq = dma_alloc_coherent(&qedi->pdev->dev,
1638                                                                 qedi->global_queues[i]->cq_mem_size,
1639                                                                 &qedi->global_queues[i]->cq_dma,
1640                                                                 GFP_KERNEL);
1641
1642                 if (!qedi->global_queues[i]->cq) {
1643                         QEDI_WARN(&qedi->dbg_ctx,
1644                                   "Could not allocate cq.\n");
1645                         status = -ENOMEM;
1646                         goto mem_alloc_failure;
1647                 }
1648                 qedi->global_queues[i]->cq_pbl = dma_alloc_coherent(&qedi->pdev->dev,
1649                                                                     qedi->global_queues[i]->cq_pbl_size,
1650                                                                     &qedi->global_queues[i]->cq_pbl_dma,
1651                                                                     GFP_KERNEL);
1652
1653                 if (!qedi->global_queues[i]->cq_pbl) {
1654                         QEDI_WARN(&qedi->dbg_ctx,
1655                                   "Could not allocate cq PBL.\n");
1656                         status = -ENOMEM;
1657                         goto mem_alloc_failure;
1658                 }
1659
1660                 /* Create PBL */
1661                 num_pages = qedi->global_queues[i]->cq_mem_size /
1662                     QEDI_PAGE_SIZE;
1663                 page = qedi->global_queues[i]->cq_dma;
1664                 pbl = (u32 *)qedi->global_queues[i]->cq_pbl;
1665
1666                 while (num_pages--) {
1667                         *pbl = (u32)page;
1668                         pbl++;
1669                         *pbl = (u32)((u64)page >> 32);
1670                         pbl++;
1671                         page += QEDI_PAGE_SIZE;
1672                 }
1673         }
1674
1675         list = (u32 *)qedi->p_cpuq;
1676
1677         /*
1678          * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer,
1679          * CQ#1 PBL pointer, RQ#1 PBL pointer, etc.  Each PBL pointer points
1680          * to the physical address which contains an array of pointers to the
1681          * physical addresses of the specific queue pages.
1682          */
1683         for (i = 0; i < qedi->num_queues; i++) {
1684                 *list = (u32)qedi->global_queues[i]->cq_pbl_dma;
1685                 list++;
1686                 *list = (u32)((u64)qedi->global_queues[i]->cq_pbl_dma >> 32);
1687                 list++;
1688
1689                 *list = (u32)0;
1690                 list++;
1691                 *list = (u32)((u64)0 >> 32);
1692                 list++;
1693         }
1694
1695         return 0;
1696
1697 mem_alloc_failure:
1698         qedi_free_global_queues(qedi);
1699         return status;
1700 }
1701
1702 int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1703 {
1704         int rval = 0;
1705         u32 *pbl;
1706         dma_addr_t page;
1707         int num_pages;
1708
1709         if (!ep)
1710                 return -EIO;
1711
1712         /* Calculate appropriate queue and PBL sizes */
1713         ep->sq_mem_size = QEDI_SQ_SIZE * sizeof(struct iscsi_wqe);
1714         ep->sq_mem_size += QEDI_PAGE_SIZE - 1;
1715
1716         ep->sq_pbl_size = (ep->sq_mem_size / QEDI_PAGE_SIZE) * sizeof(void *);
1717         ep->sq_pbl_size = ep->sq_pbl_size + QEDI_PAGE_SIZE;
1718
1719         ep->sq = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_mem_size,
1720                                     &ep->sq_dma, GFP_KERNEL);
1721         if (!ep->sq) {
1722                 QEDI_WARN(&qedi->dbg_ctx,
1723                           "Could not allocate send queue.\n");
1724                 rval = -ENOMEM;
1725                 goto out;
1726         }
1727         ep->sq_pbl = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_pbl_size,
1728                                         &ep->sq_pbl_dma, GFP_KERNEL);
1729         if (!ep->sq_pbl) {
1730                 QEDI_WARN(&qedi->dbg_ctx,
1731                           "Could not allocate send queue PBL.\n");
1732                 rval = -ENOMEM;
1733                 goto out_free_sq;
1734         }
1735
1736         /* Create PBL */
1737         num_pages = ep->sq_mem_size / QEDI_PAGE_SIZE;
1738         page = ep->sq_dma;
1739         pbl = (u32 *)ep->sq_pbl;
1740
1741         while (num_pages--) {
1742                 *pbl = (u32)page;
1743                 pbl++;
1744                 *pbl = (u32)((u64)page >> 32);
1745                 pbl++;
1746                 page += QEDI_PAGE_SIZE;
1747         }
1748
1749         return rval;
1750
1751 out_free_sq:
1752         dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1753                           ep->sq_dma);
1754 out:
1755         return rval;
1756 }
1757
1758 void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1759 {
1760         if (ep->sq_pbl)
1761                 dma_free_coherent(&qedi->pdev->dev, ep->sq_pbl_size, ep->sq_pbl,
1762                                   ep->sq_pbl_dma);
1763         if (ep->sq)
1764                 dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1765                                   ep->sq_dma);
1766 }
1767
1768 int qedi_get_task_idx(struct qedi_ctx *qedi)
1769 {
1770         s16 tmp_idx;
1771
1772 again:
1773         tmp_idx = find_first_zero_bit(qedi->task_idx_map,
1774                                       MAX_ISCSI_TASK_ENTRIES);
1775
1776         if (tmp_idx >= MAX_ISCSI_TASK_ENTRIES) {
1777                 QEDI_ERR(&qedi->dbg_ctx, "FW task context pool is full.\n");
1778                 tmp_idx = -1;
1779                 goto err_idx;
1780         }
1781
1782         if (test_and_set_bit(tmp_idx, qedi->task_idx_map))
1783                 goto again;
1784
1785 err_idx:
1786         return tmp_idx;
1787 }
1788
1789 void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx)
1790 {
1791         if (!test_and_clear_bit(idx, qedi->task_idx_map))
1792                 QEDI_ERR(&qedi->dbg_ctx,
1793                          "FW task context, already cleared, tid=0x%x\n", idx);
1794 }
1795
1796 void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt,
1797                          struct qedi_cmd *cmd)
1798 {
1799         qedi->itt_map[tid].itt = proto_itt;
1800         qedi->itt_map[tid].p_cmd = cmd;
1801
1802         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1803                   "update itt map tid=0x%x, with proto itt=0x%x\n", tid,
1804                   qedi->itt_map[tid].itt);
1805 }
1806
1807 void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, s16 *tid)
1808 {
1809         u16 i;
1810
1811         for (i = 0; i < MAX_ISCSI_TASK_ENTRIES; i++) {
1812                 if (qedi->itt_map[i].itt == itt) {
1813                         *tid = i;
1814                         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1815                                   "Ref itt=0x%x, found at tid=0x%x\n",
1816                                   itt, *tid);
1817                         return;
1818                 }
1819         }
1820
1821         WARN_ON(1);
1822 }
1823
1824 void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt)
1825 {
1826         *proto_itt = qedi->itt_map[tid].itt;
1827         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1828                   "Get itt map tid [0x%x with proto itt[0x%x]",
1829                   tid, *proto_itt);
1830 }
1831
1832 struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid)
1833 {
1834         struct qedi_cmd *cmd = NULL;
1835
1836         if (tid >= MAX_ISCSI_TASK_ENTRIES)
1837                 return NULL;
1838
1839         cmd = qedi->itt_map[tid].p_cmd;
1840         if (cmd->task_id != tid)
1841                 return NULL;
1842
1843         qedi->itt_map[tid].p_cmd = NULL;
1844
1845         return cmd;
1846 }
1847
1848 static int qedi_alloc_itt(struct qedi_ctx *qedi)
1849 {
1850         qedi->itt_map = kcalloc(MAX_ISCSI_TASK_ENTRIES,
1851                                 sizeof(struct qedi_itt_map), GFP_KERNEL);
1852         if (!qedi->itt_map) {
1853                 QEDI_ERR(&qedi->dbg_ctx,
1854                          "Unable to allocate itt map array memory\n");
1855                 return -ENOMEM;
1856         }
1857         return 0;
1858 }
1859
1860 static void qedi_free_itt(struct qedi_ctx *qedi)
1861 {
1862         kfree(qedi->itt_map);
1863 }
1864
1865 static struct qed_ll2_cb_ops qedi_ll2_cb_ops = {
1866         .rx_cb = qedi_ll2_rx,
1867         .tx_cb = NULL,
1868 };
1869
1870 static int qedi_percpu_io_thread(void *arg)
1871 {
1872         struct qedi_percpu_s *p = arg;
1873         struct qedi_work *work, *tmp;
1874         unsigned long flags;
1875         LIST_HEAD(work_list);
1876
1877         set_user_nice(current, -20);
1878
1879         while (!kthread_should_stop()) {
1880                 spin_lock_irqsave(&p->p_work_lock, flags);
1881                 while (!list_empty(&p->work_list)) {
1882                         list_splice_init(&p->work_list, &work_list);
1883                         spin_unlock_irqrestore(&p->p_work_lock, flags);
1884
1885                         list_for_each_entry_safe(work, tmp, &work_list, list) {
1886                                 list_del_init(&work->list);
1887                                 qedi_fp_process_cqes(work);
1888                                 if (!work->is_solicited)
1889                                         kfree(work);
1890                         }
1891                         cond_resched();
1892                         spin_lock_irqsave(&p->p_work_lock, flags);
1893                 }
1894                 set_current_state(TASK_INTERRUPTIBLE);
1895                 spin_unlock_irqrestore(&p->p_work_lock, flags);
1896                 schedule();
1897         }
1898         __set_current_state(TASK_RUNNING);
1899
1900         return 0;
1901 }
1902
1903 static int qedi_cpu_online(unsigned int cpu)
1904 {
1905         struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1906         struct task_struct *thread;
1907
1908         thread = kthread_create_on_node(qedi_percpu_io_thread, (void *)p,
1909                                         cpu_to_node(cpu),
1910                                         "qedi_thread/%d", cpu);
1911         if (IS_ERR(thread))
1912                 return PTR_ERR(thread);
1913
1914         kthread_bind(thread, cpu);
1915         p->iothread = thread;
1916         wake_up_process(thread);
1917         return 0;
1918 }
1919
1920 static int qedi_cpu_offline(unsigned int cpu)
1921 {
1922         struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1923         struct qedi_work *work, *tmp;
1924         struct task_struct *thread;
1925
1926         spin_lock_bh(&p->p_work_lock);
1927         thread = p->iothread;
1928         p->iothread = NULL;
1929
1930         list_for_each_entry_safe(work, tmp, &p->work_list, list) {
1931                 list_del_init(&work->list);
1932                 qedi_fp_process_cqes(work);
1933                 if (!work->is_solicited)
1934                         kfree(work);
1935         }
1936
1937         spin_unlock_bh(&p->p_work_lock);
1938         if (thread)
1939                 kthread_stop(thread);
1940         return 0;
1941 }
1942
1943 void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu)
1944 {
1945         struct qed_ll2_params params;
1946
1947         qedi_recover_all_conns(qedi);
1948
1949         qedi_ops->ll2->stop(qedi->cdev);
1950         qedi_ll2_free_skbs(qedi);
1951
1952         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "old MTU %u, new MTU %u\n",
1953                   qedi->ll2_mtu, mtu);
1954         memset(&params, 0, sizeof(params));
1955         qedi->ll2_mtu = mtu;
1956         params.mtu = qedi->ll2_mtu + IPV6_HDR_LEN + TCP_HDR_LEN;
1957         params.drop_ttl0_packets = 0;
1958         params.rx_vlan_stripping = 1;
1959         ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
1960         qedi_ops->ll2->start(qedi->cdev, &params);
1961 }
1962
1963 /*
1964  * qedi_get_nvram_block: - Scan through the iSCSI NVRAM block (while accounting
1965  * for gaps) for the matching absolute-pf-id of the QEDI device.
1966  */
1967 static struct nvm_iscsi_block *
1968 qedi_get_nvram_block(struct qedi_ctx *qedi)
1969 {
1970         int i;
1971         u8 pf;
1972         u32 flags;
1973         struct nvm_iscsi_block *block;
1974
1975         pf = qedi->dev_info.common.abs_pf_id;
1976         block = &qedi->iscsi_image->iscsi_cfg.block[0];
1977         for (i = 0; i < NUM_OF_ISCSI_PF_SUPPORTED; i++, block++) {
1978                 flags = ((block->id) & NVM_ISCSI_CFG_BLK_CTRL_FLAG_MASK) >>
1979                         NVM_ISCSI_CFG_BLK_CTRL_FLAG_OFFSET;
1980                 if (flags & (NVM_ISCSI_CFG_BLK_CTRL_FLAG_IS_NOT_EMPTY |
1981                                 NVM_ISCSI_CFG_BLK_CTRL_FLAG_PF_MAPPED) &&
1982                         (pf == (block->id & NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_MASK)
1983                                 >> NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_OFFSET))
1984                         return block;
1985         }
1986         return NULL;
1987 }
1988
1989 static ssize_t qedi_show_boot_eth_info(void *data, int type, char *buf)
1990 {
1991         struct qedi_ctx *qedi = data;
1992         struct nvm_iscsi_initiator *initiator;
1993         int rc = 1;
1994         u32 ipv6_en, dhcp_en, ip_len;
1995         struct nvm_iscsi_block *block;
1996         char *fmt, *ip, *sub, *gw;
1997
1998         block = qedi_get_nvram_block(qedi);
1999         if (!block)
2000                 return 0;
2001
2002         initiator = &block->initiator;
2003         ipv6_en = block->generic.ctrl_flags &
2004                   NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
2005         dhcp_en = block->generic.ctrl_flags &
2006                   NVM_ISCSI_CFG_GEN_DHCP_TCPIP_CONFIG_ENABLED;
2007         /* Static IP assignments. */
2008         fmt = ipv6_en ? "%pI6\n" : "%pI4\n";
2009         ip = ipv6_en ? initiator->ipv6.addr.byte : initiator->ipv4.addr.byte;
2010         ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
2011         sub = ipv6_en ? initiator->ipv6.subnet_mask.byte :
2012               initiator->ipv4.subnet_mask.byte;
2013         gw = ipv6_en ? initiator->ipv6.gateway.byte :
2014              initiator->ipv4.gateway.byte;
2015         /* DHCP IP adjustments. */
2016         fmt = dhcp_en ? "%s\n" : fmt;
2017         if (dhcp_en) {
2018                 ip = ipv6_en ? "0::0" : "0.0.0.0";
2019                 sub = ip;
2020                 gw = ip;
2021                 ip_len = ipv6_en ? 5 : 8;
2022         }
2023
2024         switch (type) {
2025         case ISCSI_BOOT_ETH_IP_ADDR:
2026                 rc = snprintf(buf, ip_len, fmt, ip);
2027                 break;
2028         case ISCSI_BOOT_ETH_SUBNET_MASK:
2029                 rc = snprintf(buf, ip_len, fmt, sub);
2030                 break;
2031         case ISCSI_BOOT_ETH_GATEWAY:
2032                 rc = snprintf(buf, ip_len, fmt, gw);
2033                 break;
2034         case ISCSI_BOOT_ETH_FLAGS:
2035                 rc = snprintf(buf, 3, "%hhd\n",
2036                               SYSFS_FLAG_FW_SEL_BOOT);
2037                 break;
2038         case ISCSI_BOOT_ETH_INDEX:
2039                 rc = snprintf(buf, 3, "0\n");
2040                 break;
2041         case ISCSI_BOOT_ETH_MAC:
2042                 rc = sysfs_format_mac(buf, qedi->mac, ETH_ALEN);
2043                 break;
2044         case ISCSI_BOOT_ETH_VLAN:
2045                 rc = snprintf(buf, 12, "%d\n",
2046                               GET_FIELD2(initiator->generic_cont0,
2047                                          NVM_ISCSI_CFG_INITIATOR_VLAN));
2048                 break;
2049         case ISCSI_BOOT_ETH_ORIGIN:
2050                 if (dhcp_en)
2051                         rc = snprintf(buf, 3, "3\n");
2052                 break;
2053         default:
2054                 rc = 0;
2055                 break;
2056         }
2057
2058         return rc;
2059 }
2060
2061 static umode_t qedi_eth_get_attr_visibility(void *data, int type)
2062 {
2063         int rc = 1;
2064
2065         switch (type) {
2066         case ISCSI_BOOT_ETH_FLAGS:
2067         case ISCSI_BOOT_ETH_MAC:
2068         case ISCSI_BOOT_ETH_INDEX:
2069         case ISCSI_BOOT_ETH_IP_ADDR:
2070         case ISCSI_BOOT_ETH_SUBNET_MASK:
2071         case ISCSI_BOOT_ETH_GATEWAY:
2072         case ISCSI_BOOT_ETH_ORIGIN:
2073         case ISCSI_BOOT_ETH_VLAN:
2074                 rc = 0444;
2075                 break;
2076         default:
2077                 rc = 0;
2078                 break;
2079         }
2080         return rc;
2081 }
2082
2083 static ssize_t qedi_show_boot_ini_info(void *data, int type, char *buf)
2084 {
2085         struct qedi_ctx *qedi = data;
2086         struct nvm_iscsi_initiator *initiator;
2087         int rc;
2088         struct nvm_iscsi_block *block;
2089
2090         block = qedi_get_nvram_block(qedi);
2091         if (!block)
2092                 return 0;
2093
2094         initiator = &block->initiator;
2095
2096         switch (type) {
2097         case ISCSI_BOOT_INI_INITIATOR_NAME:
2098                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN,
2099                              initiator->initiator_name.byte);
2100                 break;
2101         default:
2102                 rc = 0;
2103                 break;
2104         }
2105         return rc;
2106 }
2107
2108 static umode_t qedi_ini_get_attr_visibility(void *data, int type)
2109 {
2110         int rc;
2111
2112         switch (type) {
2113         case ISCSI_BOOT_INI_INITIATOR_NAME:
2114                 rc = 0444;
2115                 break;
2116         default:
2117                 rc = 0;
2118                 break;
2119         }
2120         return rc;
2121 }
2122
2123 static ssize_t
2124 qedi_show_boot_tgt_info(struct qedi_ctx *qedi, int type,
2125                         char *buf, enum qedi_nvm_tgts idx)
2126 {
2127         int rc = 1;
2128         u32 ctrl_flags, ipv6_en, chap_en, mchap_en, ip_len;
2129         struct nvm_iscsi_block *block;
2130         char *chap_name, *chap_secret;
2131         char *mchap_name, *mchap_secret;
2132
2133         block = qedi_get_nvram_block(qedi);
2134         if (!block)
2135                 goto exit_show_tgt_info;
2136
2137         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
2138                   "Port:%d, tgt_idx:%d\n",
2139                   GET_FIELD2(block->id, NVM_ISCSI_CFG_BLK_MAPPED_PF_ID), idx);
2140
2141         ctrl_flags = block->target[idx].ctrl_flags &
2142                      NVM_ISCSI_CFG_TARGET_ENABLED;
2143
2144         if (!ctrl_flags) {
2145                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
2146                           "Target disabled\n");
2147                 goto exit_show_tgt_info;
2148         }
2149
2150         ipv6_en = block->generic.ctrl_flags &
2151                   NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
2152         ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
2153         chap_en = block->generic.ctrl_flags &
2154                   NVM_ISCSI_CFG_GEN_CHAP_ENABLED;
2155         chap_name = chap_en ? block->initiator.chap_name.byte : NULL;
2156         chap_secret = chap_en ? block->initiator.chap_password.byte : NULL;
2157
2158         mchap_en = block->generic.ctrl_flags &
2159                   NVM_ISCSI_CFG_GEN_CHAP_MUTUAL_ENABLED;
2160         mchap_name = mchap_en ? block->target[idx].chap_name.byte : NULL;
2161         mchap_secret = mchap_en ? block->target[idx].chap_password.byte : NULL;
2162
2163         switch (type) {
2164         case ISCSI_BOOT_TGT_NAME:
2165                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN,
2166                              block->target[idx].target_name.byte);
2167                 break;
2168         case ISCSI_BOOT_TGT_IP_ADDR:
2169                 if (ipv6_en)
2170                         rc = snprintf(buf, ip_len, "%pI6\n",
2171                                       block->target[idx].ipv6_addr.byte);
2172                 else
2173                         rc = snprintf(buf, ip_len, "%pI4\n",
2174                                       block->target[idx].ipv4_addr.byte);
2175                 break;
2176         case ISCSI_BOOT_TGT_PORT:
2177                 rc = snprintf(buf, 12, "%d\n",
2178                               GET_FIELD2(block->target[idx].generic_cont0,
2179                                          NVM_ISCSI_CFG_TARGET_TCP_PORT));
2180                 break;
2181         case ISCSI_BOOT_TGT_LUN:
2182                 rc = snprintf(buf, 22, "%.*d\n",
2183                               block->target[idx].lun.value[1],
2184                               block->target[idx].lun.value[0]);
2185                 break;
2186         case ISCSI_BOOT_TGT_CHAP_NAME:
2187                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2188                              chap_name);
2189                 break;
2190         case ISCSI_BOOT_TGT_CHAP_SECRET:
2191                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2192                              chap_secret);
2193                 break;
2194         case ISCSI_BOOT_TGT_REV_CHAP_NAME:
2195                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2196                              mchap_name);
2197                 break;
2198         case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
2199                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2200                              mchap_secret);
2201                 break;
2202         case ISCSI_BOOT_TGT_FLAGS:
2203                 rc = snprintf(buf, 3, "%hhd\n", SYSFS_FLAG_FW_SEL_BOOT);
2204                 break;
2205         case ISCSI_BOOT_TGT_NIC_ASSOC:
2206                 rc = snprintf(buf, 3, "0\n");
2207                 break;
2208         default:
2209                 rc = 0;
2210                 break;
2211         }
2212
2213 exit_show_tgt_info:
2214         return rc;
2215 }
2216
2217 static ssize_t qedi_show_boot_tgt_pri_info(void *data, int type, char *buf)
2218 {
2219         struct qedi_ctx *qedi = data;
2220
2221         return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_PRI);
2222 }
2223
2224 static ssize_t qedi_show_boot_tgt_sec_info(void *data, int type, char *buf)
2225 {
2226         struct qedi_ctx *qedi = data;
2227
2228         return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_SEC);
2229 }
2230
2231 static umode_t qedi_tgt_get_attr_visibility(void *data, int type)
2232 {
2233         int rc;
2234
2235         switch (type) {
2236         case ISCSI_BOOT_TGT_NAME:
2237         case ISCSI_BOOT_TGT_IP_ADDR:
2238         case ISCSI_BOOT_TGT_PORT:
2239         case ISCSI_BOOT_TGT_LUN:
2240         case ISCSI_BOOT_TGT_CHAP_NAME:
2241         case ISCSI_BOOT_TGT_CHAP_SECRET:
2242         case ISCSI_BOOT_TGT_REV_CHAP_NAME:
2243         case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
2244         case ISCSI_BOOT_TGT_NIC_ASSOC:
2245         case ISCSI_BOOT_TGT_FLAGS:
2246                 rc = 0444;
2247                 break;
2248         default:
2249                 rc = 0;
2250                 break;
2251         }
2252         return rc;
2253 }
2254
2255 static void qedi_boot_release(void *data)
2256 {
2257         struct qedi_ctx *qedi = data;
2258
2259         scsi_host_put(qedi->shost);
2260 }
2261
2262 static int qedi_get_boot_info(struct qedi_ctx *qedi)
2263 {
2264         int ret = 1;
2265
2266         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2267                   "Get NVM iSCSI CFG image\n");
2268         ret = qedi_ops->common->nvm_get_image(qedi->cdev,
2269                                               QED_NVM_IMAGE_ISCSI_CFG,
2270                                               (char *)qedi->iscsi_image,
2271                                               sizeof(struct qedi_nvm_iscsi_image));
2272         if (ret)
2273                 QEDI_ERR(&qedi->dbg_ctx,
2274                          "Could not get NVM image. ret = %d\n", ret);
2275
2276         return ret;
2277 }
2278
2279 static int qedi_setup_boot_info(struct qedi_ctx *qedi)
2280 {
2281         struct iscsi_boot_kobj *boot_kobj;
2282
2283         if (qedi_get_boot_info(qedi))
2284                 return -EPERM;
2285
2286         qedi->boot_kset = iscsi_boot_create_host_kset(qedi->shost->host_no);
2287         if (!qedi->boot_kset)
2288                 goto kset_free;
2289
2290         if (!scsi_host_get(qedi->shost))
2291                 goto kset_free;
2292
2293         boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 0, qedi,
2294                                              qedi_show_boot_tgt_pri_info,
2295                                              qedi_tgt_get_attr_visibility,
2296                                              qedi_boot_release);
2297         if (!boot_kobj)
2298                 goto put_host;
2299
2300         if (!scsi_host_get(qedi->shost))
2301                 goto kset_free;
2302
2303         boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 1, qedi,
2304                                              qedi_show_boot_tgt_sec_info,
2305                                              qedi_tgt_get_attr_visibility,
2306                                              qedi_boot_release);
2307         if (!boot_kobj)
2308                 goto put_host;
2309
2310         if (!scsi_host_get(qedi->shost))
2311                 goto kset_free;
2312
2313         boot_kobj = iscsi_boot_create_initiator(qedi->boot_kset, 0, qedi,
2314                                                 qedi_show_boot_ini_info,
2315                                                 qedi_ini_get_attr_visibility,
2316                                                 qedi_boot_release);
2317         if (!boot_kobj)
2318                 goto put_host;
2319
2320         if (!scsi_host_get(qedi->shost))
2321                 goto kset_free;
2322
2323         boot_kobj = iscsi_boot_create_ethernet(qedi->boot_kset, 0, qedi,
2324                                                qedi_show_boot_eth_info,
2325                                                qedi_eth_get_attr_visibility,
2326                                                qedi_boot_release);
2327         if (!boot_kobj)
2328                 goto put_host;
2329
2330         return 0;
2331
2332 put_host:
2333         scsi_host_put(qedi->shost);
2334 kset_free:
2335         iscsi_boot_destroy_kset(qedi->boot_kset);
2336         return -ENOMEM;
2337 }
2338
2339 static void __qedi_remove(struct pci_dev *pdev, int mode)
2340 {
2341         struct qedi_ctx *qedi = pci_get_drvdata(pdev);
2342         int rval;
2343
2344         if (mode == QEDI_MODE_SHUTDOWN)
2345                 iscsi_host_for_each_session(qedi->shost,
2346                                             qedi_clear_session_ctx);
2347
2348         if (mode == QEDI_MODE_NORMAL || mode == QEDI_MODE_SHUTDOWN) {
2349                 if (qedi->tmf_thread) {
2350                         flush_workqueue(qedi->tmf_thread);
2351                         destroy_workqueue(qedi->tmf_thread);
2352                         qedi->tmf_thread = NULL;
2353                 }
2354
2355                 if (qedi->offload_thread) {
2356                         flush_workqueue(qedi->offload_thread);
2357                         destroy_workqueue(qedi->offload_thread);
2358                         qedi->offload_thread = NULL;
2359                 }
2360         }
2361
2362 #ifdef CONFIG_DEBUG_FS
2363         qedi_dbg_host_exit(&qedi->dbg_ctx);
2364 #endif
2365         if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags))
2366                 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2367
2368         qedi_sync_free_irqs(qedi);
2369
2370         if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
2371                 qedi_ops->stop(qedi->cdev);
2372                 qedi_ops->ll2->stop(qedi->cdev);
2373         }
2374
2375         qedi_free_iscsi_pf_param(qedi);
2376
2377         rval = qedi_ops->common->update_drv_state(qedi->cdev, false);
2378         if (rval)
2379                 QEDI_ERR(&qedi->dbg_ctx, "Failed to send drv state to MFW\n");
2380
2381         if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
2382                 qedi_ops->common->slowpath_stop(qedi->cdev);
2383                 qedi_ops->common->remove(qedi->cdev);
2384         }
2385
2386         qedi_destroy_fp(qedi);
2387
2388         if (mode == QEDI_MODE_NORMAL || mode == QEDI_MODE_SHUTDOWN) {
2389                 qedi_release_cid_que(qedi);
2390                 qedi_cm_free_mem(qedi);
2391                 qedi_free_uio(qedi->udev);
2392                 qedi_free_itt(qedi);
2393
2394                 if (qedi->ll2_recv_thread) {
2395                         kthread_stop(qedi->ll2_recv_thread);
2396                         qedi->ll2_recv_thread = NULL;
2397                 }
2398                 qedi_ll2_free_skbs(qedi);
2399
2400                 if (qedi->boot_kset)
2401                         iscsi_boot_destroy_kset(qedi->boot_kset);
2402
2403                 iscsi_host_remove(qedi->shost);
2404                 iscsi_host_free(qedi->shost);
2405         }
2406 }
2407
2408 static void qedi_shutdown(struct pci_dev *pdev)
2409 {
2410         struct qedi_ctx *qedi = pci_get_drvdata(pdev);
2411
2412         QEDI_ERR(&qedi->dbg_ctx, "%s: Shutdown qedi\n", __func__);
2413         if (test_and_set_bit(QEDI_IN_SHUTDOWN, &qedi->flags))
2414                 return;
2415         __qedi_remove(pdev, QEDI_MODE_SHUTDOWN);
2416 }
2417
2418 static int __qedi_probe(struct pci_dev *pdev, int mode)
2419 {
2420         struct qedi_ctx *qedi;
2421         struct qed_ll2_params params;
2422         u8 dp_level = 0;
2423         bool is_vf = false;
2424         char host_buf[16];
2425         struct qed_link_params link_params;
2426         struct qed_slowpath_params sp_params;
2427         struct qed_probe_params qed_params;
2428         void *task_start, *task_end;
2429         int rc;
2430
2431         if (mode != QEDI_MODE_RECOVERY) {
2432                 qedi = qedi_host_alloc(pdev);
2433                 if (!qedi) {
2434                         rc = -ENOMEM;
2435                         goto exit_probe;
2436                 }
2437         } else {
2438                 qedi = pci_get_drvdata(pdev);
2439         }
2440
2441         memset(&qed_params, 0, sizeof(qed_params));
2442         qed_params.protocol = QED_PROTOCOL_ISCSI;
2443         qed_params.dp_module = qedi_qed_debug;
2444         qed_params.dp_level = dp_level;
2445         qed_params.is_vf = is_vf;
2446         qedi->cdev = qedi_ops->common->probe(pdev, &qed_params);
2447         if (!qedi->cdev) {
2448                 rc = -ENODEV;
2449                 QEDI_ERR(&qedi->dbg_ctx, "Cannot initialize hardware\n");
2450                 goto free_host;
2451         }
2452
2453         atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
2454
2455         rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
2456         if (rc)
2457                 goto free_host;
2458
2459         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2460                   "dev_info: num_hwfns=%d affin_hwfn_idx=%d.\n",
2461                   qedi->dev_info.common.num_hwfns,
2462                   qedi_ops->common->get_affin_hwfn_idx(qedi->cdev));
2463
2464         rc = qedi_set_iscsi_pf_param(qedi);
2465         if (rc) {
2466                 rc = -ENOMEM;
2467                 QEDI_ERR(&qedi->dbg_ctx,
2468                          "Set iSCSI pf param fail\n");
2469                 goto free_host;
2470         }
2471
2472         qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2473
2474         rc = qedi_prepare_fp(qedi);
2475         if (rc) {
2476                 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath.\n");
2477                 goto free_pf_params;
2478         }
2479
2480         /* Start the Slowpath-process */
2481         memset(&sp_params, 0, sizeof(struct qed_slowpath_params));
2482         sp_params.int_mode = QED_INT_MODE_MSIX;
2483         sp_params.drv_major = QEDI_DRIVER_MAJOR_VER;
2484         sp_params.drv_minor = QEDI_DRIVER_MINOR_VER;
2485         sp_params.drv_rev = QEDI_DRIVER_REV_VER;
2486         sp_params.drv_eng = QEDI_DRIVER_ENG_VER;
2487         strlcpy(sp_params.name, "qedi iSCSI", QED_DRV_VER_STR_SIZE);
2488         rc = qedi_ops->common->slowpath_start(qedi->cdev, &sp_params);
2489         if (rc) {
2490                 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath\n");
2491                 goto stop_hw;
2492         }
2493
2494         /* update_pf_params needs to be called before and after slowpath
2495          * start
2496          */
2497         qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2498
2499         rc = qedi_setup_int(qedi);
2500         if (rc)
2501                 goto stop_iscsi_func;
2502
2503         qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2504
2505         /* Learn information crucial for qedi to progress */
2506         rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
2507         if (rc)
2508                 goto stop_iscsi_func;
2509
2510         /* Record BDQ producer doorbell addresses */
2511         qedi->bdq_primary_prod = qedi->dev_info.primary_dbq_rq_addr;
2512         qedi->bdq_secondary_prod = qedi->dev_info.secondary_bdq_rq_addr;
2513         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2514                   "BDQ primary_prod=%p secondary_prod=%p.\n",
2515                   qedi->bdq_primary_prod,
2516                   qedi->bdq_secondary_prod);
2517
2518         /*
2519          * We need to write the number of BDs in the BDQ we've preallocated so
2520          * the f/w will do a prefetch and we'll get an unsolicited CQE when a
2521          * packet arrives.
2522          */
2523         qedi->bdq_prod_idx = QEDI_BDQ_NUM;
2524         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2525                   "Writing %d to primary and secondary BDQ doorbell registers.\n",
2526                   qedi->bdq_prod_idx);
2527         writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
2528         readw(qedi->bdq_primary_prod);
2529         writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
2530         readw(qedi->bdq_secondary_prod);
2531
2532         ether_addr_copy(qedi->mac, qedi->dev_info.common.hw_mac);
2533         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "MAC address is %pM.\n",
2534                   qedi->mac);
2535
2536         sprintf(host_buf, "host_%d", qedi->shost->host_no);
2537         qedi_ops->common->set_name(qedi->cdev, host_buf);
2538
2539         qedi_ops->register_ops(qedi->cdev, &qedi_cb_ops, qedi);
2540
2541         memset(&params, 0, sizeof(params));
2542         params.mtu = DEF_PATH_MTU + IPV6_HDR_LEN + TCP_HDR_LEN;
2543         qedi->ll2_mtu = DEF_PATH_MTU;
2544         params.drop_ttl0_packets = 0;
2545         params.rx_vlan_stripping = 1;
2546         ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
2547
2548         if (mode != QEDI_MODE_RECOVERY) {
2549                 /* set up rx path */
2550                 INIT_LIST_HEAD(&qedi->ll2_skb_list);
2551                 spin_lock_init(&qedi->ll2_lock);
2552                 /* start qedi context */
2553                 spin_lock_init(&qedi->hba_lock);
2554                 spin_lock_init(&qedi->task_idx_lock);
2555                 mutex_init(&qedi->stats_lock);
2556         }
2557         qedi_ops->ll2->register_cb_ops(qedi->cdev, &qedi_ll2_cb_ops, qedi);
2558         qedi_ops->ll2->start(qedi->cdev, &params);
2559
2560         if (mode != QEDI_MODE_RECOVERY) {
2561                 qedi->ll2_recv_thread = kthread_run(qedi_ll2_recv_thread,
2562                                                     (void *)qedi,
2563                                                     "qedi_ll2_thread");
2564         }
2565
2566         rc = qedi_ops->start(qedi->cdev, &qedi->tasks,
2567                              qedi, qedi_iscsi_event_cb);
2568         if (rc) {
2569                 rc = -ENODEV;
2570                 QEDI_ERR(&qedi->dbg_ctx, "Cannot start iSCSI function\n");
2571                 goto stop_slowpath;
2572         }
2573
2574         task_start = qedi_get_task_mem(&qedi->tasks, 0);
2575         task_end = qedi_get_task_mem(&qedi->tasks, MAX_TID_BLOCKS_ISCSI - 1);
2576         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2577                   "Task context start=%p, end=%p block_size=%u.\n",
2578                    task_start, task_end, qedi->tasks.size);
2579
2580         memset(&link_params, 0, sizeof(link_params));
2581         link_params.link_up = true;
2582         rc = qedi_ops->common->set_link(qedi->cdev, &link_params);
2583         if (rc) {
2584                 QEDI_WARN(&qedi->dbg_ctx, "Link set up failed.\n");
2585                 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
2586         }
2587
2588 #ifdef CONFIG_DEBUG_FS
2589         qedi_dbg_host_init(&qedi->dbg_ctx, qedi_debugfs_ops,
2590                            qedi_dbg_fops);
2591 #endif
2592         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2593                   "QLogic FastLinQ iSCSI Module qedi %s, FW %d.%d.%d.%d\n",
2594                   QEDI_MODULE_VERSION, FW_MAJOR_VERSION, FW_MINOR_VERSION,
2595                   FW_REVISION_VERSION, FW_ENGINEERING_VERSION);
2596
2597         if (mode == QEDI_MODE_NORMAL) {
2598                 if (iscsi_host_add(qedi->shost, &pdev->dev)) {
2599                         QEDI_ERR(&qedi->dbg_ctx,
2600                                  "Could not add iscsi host\n");
2601                         rc = -ENOMEM;
2602                         goto remove_host;
2603                 }
2604
2605                 /* Allocate uio buffers */
2606                 rc = qedi_alloc_uio_rings(qedi);
2607                 if (rc) {
2608                         QEDI_ERR(&qedi->dbg_ctx,
2609                                  "UIO alloc ring failed err=%d\n", rc);
2610                         goto remove_host;
2611                 }
2612
2613                 rc = qedi_init_uio(qedi);
2614                 if (rc) {
2615                         QEDI_ERR(&qedi->dbg_ctx,
2616                                  "UIO init failed, err=%d\n", rc);
2617                         goto free_uio;
2618                 }
2619
2620                 /* host the array on iscsi_conn */
2621                 rc = qedi_setup_cid_que(qedi);
2622                 if (rc) {
2623                         QEDI_ERR(&qedi->dbg_ctx,
2624                                  "Could not setup cid que\n");
2625                         goto free_uio;
2626                 }
2627
2628                 rc = qedi_cm_alloc_mem(qedi);
2629                 if (rc) {
2630                         QEDI_ERR(&qedi->dbg_ctx,
2631                                  "Could not alloc cm memory\n");
2632                         goto free_cid_que;
2633                 }
2634
2635                 rc = qedi_alloc_itt(qedi);
2636                 if (rc) {
2637                         QEDI_ERR(&qedi->dbg_ctx,
2638                                  "Could not alloc itt memory\n");
2639                         goto free_cid_que;
2640                 }
2641
2642                 sprintf(host_buf, "host_%d", qedi->shost->host_no);
2643                 qedi->tmf_thread = create_singlethread_workqueue(host_buf);
2644                 if (!qedi->tmf_thread) {
2645                         QEDI_ERR(&qedi->dbg_ctx,
2646                                  "Unable to start tmf thread!\n");
2647                         rc = -ENODEV;
2648                         goto free_cid_que;
2649                 }
2650
2651                 sprintf(host_buf, "qedi_ofld%d", qedi->shost->host_no);
2652                 qedi->offload_thread = create_workqueue(host_buf);
2653                 if (!qedi->offload_thread) {
2654                         QEDI_ERR(&qedi->dbg_ctx,
2655                                  "Unable to start offload thread!\n");
2656                         rc = -ENODEV;
2657                         goto free_cid_que;
2658                 }
2659
2660                 INIT_DELAYED_WORK(&qedi->recovery_work, qedi_recovery_handler);
2661
2662                 /* F/w needs 1st task context memory entry for performance */
2663                 set_bit(QEDI_RESERVE_TASK_ID, qedi->task_idx_map);
2664                 atomic_set(&qedi->num_offloads, 0);
2665
2666                 if (qedi_setup_boot_info(qedi))
2667                         QEDI_ERR(&qedi->dbg_ctx,
2668                                  "No iSCSI boot target configured\n");
2669
2670                 rc = qedi_ops->common->update_drv_state(qedi->cdev, true);
2671                 if (rc)
2672                         QEDI_ERR(&qedi->dbg_ctx,
2673                                  "Failed to send drv state to MFW\n");
2674
2675         }
2676
2677         return 0;
2678
2679 free_cid_que:
2680         qedi_release_cid_que(qedi);
2681 free_uio:
2682         qedi_free_uio(qedi->udev);
2683 remove_host:
2684 #ifdef CONFIG_DEBUG_FS
2685         qedi_dbg_host_exit(&qedi->dbg_ctx);
2686 #endif
2687         iscsi_host_remove(qedi->shost);
2688 stop_iscsi_func:
2689         qedi_ops->stop(qedi->cdev);
2690 stop_slowpath:
2691         qedi_ops->common->slowpath_stop(qedi->cdev);
2692 stop_hw:
2693         qedi_ops->common->remove(qedi->cdev);
2694 free_pf_params:
2695         qedi_free_iscsi_pf_param(qedi);
2696 free_host:
2697         iscsi_host_free(qedi->shost);
2698 exit_probe:
2699         return rc;
2700 }
2701
2702 static void qedi_mark_conn_recovery(struct iscsi_cls_session *cls_session)
2703 {
2704         struct iscsi_session *session = cls_session->dd_data;
2705         struct iscsi_conn *conn = session->leadconn;
2706         struct qedi_conn *qedi_conn = conn->dd_data;
2707
2708         iscsi_conn_failure(qedi_conn->cls_conn->dd_data, ISCSI_ERR_CONN_FAILED);
2709 }
2710
2711 static void qedi_recovery_handler(struct work_struct *work)
2712 {
2713         struct qedi_ctx *qedi =
2714                         container_of(work, struct qedi_ctx, recovery_work.work);
2715
2716         iscsi_host_for_each_session(qedi->shost, qedi_mark_conn_recovery);
2717
2718         /* Call common_ops->recovery_prolog to allow the MFW to quiesce
2719          * any PCI transactions.
2720          */
2721         qedi_ops->common->recovery_prolog(qedi->cdev);
2722
2723         __qedi_remove(qedi->pdev, QEDI_MODE_RECOVERY);
2724         __qedi_probe(qedi->pdev, QEDI_MODE_RECOVERY);
2725         clear_bit(QEDI_IN_RECOVERY, &qedi->flags);
2726 }
2727
2728 static int qedi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2729 {
2730         return __qedi_probe(pdev, QEDI_MODE_NORMAL);
2731 }
2732
2733 static void qedi_remove(struct pci_dev *pdev)
2734 {
2735         __qedi_remove(pdev, QEDI_MODE_NORMAL);
2736 }
2737
2738 static struct pci_device_id qedi_pci_tbl[] = {
2739         { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165E) },
2740         { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x8084) },
2741         { 0 },
2742 };
2743 MODULE_DEVICE_TABLE(pci, qedi_pci_tbl);
2744
2745 static enum cpuhp_state qedi_cpuhp_state;
2746
2747 static struct pci_driver qedi_pci_driver = {
2748         .name = QEDI_MODULE_NAME,
2749         .id_table = qedi_pci_tbl,
2750         .probe = qedi_probe,
2751         .remove = qedi_remove,
2752         .shutdown = qedi_shutdown,
2753 };
2754
2755 static int __init qedi_init(void)
2756 {
2757         struct qedi_percpu_s *p;
2758         int cpu, rc = 0;
2759
2760         qedi_ops = qed_get_iscsi_ops();
2761         if (!qedi_ops) {
2762                 QEDI_ERR(NULL, "Failed to get qed iSCSI operations\n");
2763                 return -EINVAL;
2764         }
2765
2766 #ifdef CONFIG_DEBUG_FS
2767         qedi_dbg_init("qedi");
2768 #endif
2769
2770         qedi_scsi_transport = iscsi_register_transport(&qedi_iscsi_transport);
2771         if (!qedi_scsi_transport) {
2772                 QEDI_ERR(NULL, "Could not register qedi transport");
2773                 rc = -ENOMEM;
2774                 goto exit_qedi_init_1;
2775         }
2776
2777         for_each_possible_cpu(cpu) {
2778                 p = &per_cpu(qedi_percpu, cpu);
2779                 INIT_LIST_HEAD(&p->work_list);
2780                 spin_lock_init(&p->p_work_lock);
2781                 p->iothread = NULL;
2782         }
2783
2784         rc = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "scsi/qedi:online",
2785                                qedi_cpu_online, qedi_cpu_offline);
2786         if (rc < 0)
2787                 goto exit_qedi_init_2;
2788         qedi_cpuhp_state = rc;
2789
2790         rc = pci_register_driver(&qedi_pci_driver);
2791         if (rc) {
2792                 QEDI_ERR(NULL, "Failed to register driver\n");
2793                 goto exit_qedi_hp;
2794         }
2795
2796         return 0;
2797
2798 exit_qedi_hp:
2799         cpuhp_remove_state(qedi_cpuhp_state);
2800 exit_qedi_init_2:
2801         iscsi_unregister_transport(&qedi_iscsi_transport);
2802 exit_qedi_init_1:
2803 #ifdef CONFIG_DEBUG_FS
2804         qedi_dbg_exit();
2805 #endif
2806         qed_put_iscsi_ops();
2807         return rc;
2808 }
2809
2810 static void __exit qedi_cleanup(void)
2811 {
2812         pci_unregister_driver(&qedi_pci_driver);
2813         cpuhp_remove_state(qedi_cpuhp_state);
2814         iscsi_unregister_transport(&qedi_iscsi_transport);
2815
2816 #ifdef CONFIG_DEBUG_FS
2817         qedi_dbg_exit();
2818 #endif
2819         qed_put_iscsi_ops();
2820 }
2821
2822 MODULE_DESCRIPTION("QLogic FastLinQ 4xxxx iSCSI Module");
2823 MODULE_LICENSE("GPL");
2824 MODULE_AUTHOR("QLogic Corporation");
2825 MODULE_VERSION(QEDI_MODULE_VERSION);
2826 module_init(qedi_init);
2827 module_exit(qedi_cleanup);